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Dee

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An isotope of lead, 201Pb, has a half-life of 8.4 hours. How many hours ago was there 40% more of the substance? (Round your
1. 3 answers
2. 2,380 views
Solve the exponential equation using logarithms. Give the answer in decimal form, rounding to four decimal places. (Enter your
1. 2 answers
2. 1,762 views
In 4 years, 30% of a radioactive element decays. Find its half-life. (Round your answer to one decimal place.)_____ yr
1. 2 answers
2. 1,725 views
Use a calculator to find y to four decimal places, if possible. (If an answer is undefined, enter UNDEFINED.)ln y = log 9
1. 2 answers
2. 580 views
Use a calculator to find y to four decimal places, if possible. (If an answer is undefined, enter UNDEFINED.)ln y = −0.35
1. 1 answer
2. 535 views
Use a calculator to find y to four decimal places, if possible. (If an answer is undefined, enter UNDEFINED.)ln y = −0.35
1. 1 answer
2. 795 views
Use a calculator to find y to four decimal places, if possible. (If an answer is undefined, enter UNDEFINED.)ln y = log 9
1. 2 answers
2. 561 views
Use a calculator to help solve the problem.The life expectancy of white females can be estimated by using the function =
1. 4 answers
2. 1,030 views
Use a calculator to help solve the problem.The intensity I of light (in lumens) at a distance x meters below the surface is
1. 3 answers
2. 2,419 views
Use a calculator to help solve the problem.One isotope of holmium, 162Ho, has a half life of 22 minutes. The half-life of a
1. 3 answers
2. 1,442 views
P5. A thirty U.S. Treasury bond has a 4.0 percent interest rate. In contrast, a ten-year Treasury bond has an interest rate of
1. 1 answer
2. 605 views
A bank credit card charges interest at the rate of 23% per year, compounded monthly. If a senior in college charges $1,700 to
1. 4 answers
2. 1,033 views
graph the following:7x + 6y = 42 (-6x+42)\(7)
1. 1 answer
2. 332 views
graph the following:(5/4)x-4 (4x+16)/(5)
1. 1 answer
2. 305 views
find the domain of(x-2)/(-3x+7)
1. 6 answers
2. 370 views
Letf(x) = 1/x − 2 and g(x) = 1/x − 3 . Determine the domain of the composite function. (Enter your answer using interval
1. 1 answer
2. 2,181 views
Letf(x) = square root (x + 2) and g(x) = x^2 − 2. Determine the domain of the composite function. (Enter your answer using
1. 0 answers
2. 604 views
Letf(x) = x + 2 and g(x) = x2 − 2. Determine the domain of the composite function.
1. 2 answers
2. 792 views
what is the domain of (square root of x) +7?
1. 2 answers
2. 391 views
the following rational function gives the number of days it would take two construction crews, working together, to frame a
1. 2 answers
2. 1,251 views
Need help in finding all vertical, horizontal, and slant asymptotes, x- and y-intercepts, and symmetries of f(x)=(x-3)/(x-4)
1. 2 answers
2. 465 views
What is the relationship of the concentration of H3O and of OH
1. 2 answers
2. 532 views
men from higher social classes in------ cultures tend to have low levels of conformity, more self-direction, and have greater
1. 1 answer
2. 557 views
a 100g mass of cookie dough hits inelastically with a 300g mass of cookie dough and they stick. the 100 g mass was moving to the
1. 0 answers
2. 608 views
people in countries with tend to be happierA) high incomes B) low incomes C) more civil liberties D) high incomes and more civil
1. 5 answers
2. 781 views
daydreaming can be an expression of:A) repression B) denial C) sublimation D) projection My answer is D
1. 1 answer
2. 932 views
all personality variables are:A) highly heritable B) unconscious C) theoretical constructs D) easily assessed with
1. 6 answers
2. 552 views
a rectangular swimming pool 20 feet long and 10 feet wide,is enclosed by a wooden deck that is 3 feet wide. What is the area of
1. 1 answer
2. 1,351 views
a rectangular swimming pool 20 feet long and 10 feet wide,is enclosed by a wooden deck that is 3 feet wide. What is the area of
1. 1 answer
2. 758 views
Express the relationship 20 < C < 30 in terms of F, where F = 9/5C + 32._____________ < F < _____________
1. 0 answers
2. 405 views
the cost of renting a rototiller is $16.50 for the first hour and $10.95 for each additional hour. How long can a person have
1. 1 answer
2. 570 views
The county news earns a profit of $20 per year for each of its 3000 subscribers. Management projects that the profit per
1. 1 answer
2. 709 views
Scott and Laura have both invested some money. Scott invested $2500 more than Laura and at a 3% higher interest rate. If Scott
1. 2 answers
2. 852 views
a large rectangular movie screen in an IMAX theater has an area of 8624 square feet. Find the dimensions of the screen if it is
1. 2 answers
2. 810 views
Kevin stuffs shrimp in his job as a seafood chef. He can stuff 1200 shrimp in 4 hours. When his sister helps him, they can stuff
1. 1 answer
2. 2,004 views
Allison drove home at 68 mph but her brother who left at the same time could only drive at 54 mph. When Allison arived, her
1. 1 answer
2. 1,161 views
Select the statement which reflects the employer position on electric monitoring.a.) An employee's actions during work time are
1. 4 answers
2. 630 views
A manager refuses to reveal company secrets despite an offer of handsome kickbacks. Which of the following reasons justifies her
1. 1 answer
2. 566 views
a cylinder of gas is at a room temp (20 c) the air conditioner breaks down and the tempture rises to 58c what is the new
1. 2 answers
2. 2,227 views
1. In a study of caffeine and stress, college students indicate how many cups of coffee they drink per day and their stress
1. 0 answers
2. 731 views
A landowner digs a 15 meter deep well with a diameter of 2.8 meters. The landowner spreads the dirt dug out of the holds to form
1. 1 answer
2. 913 views
An unsharpened pencil is in the shape of a hexagonal prism, in which the face edge is 4 millimeters and the length is 170
1. 1 answer
2. 2,099 views
Use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the
1. 0 answers
2. 1,468 views
For a particular reaction at 195.1 °C, ΔG = -1488.09 kJ/mol, and ΔS = 288.67 J/(mol·K).?Calculate ΔG for this reaction at
1. 4 answers
2. 2,197 views
Find the weight to the nearest kg, of the cement block. Cement weighs 1700 kg/m3.12cm x 10cm and 40cm x 20 cm x 20cm.
1. 1 answer
2. 1,298 views
The Ka of a monoprotic weak acid is 4.47 × 10-3. What is the percent ionization of a 0.184 M solution of this acid?
1. 2 answers
2. 1,087 views
A solid steel cylinder is standing (on one of its ends) vertically on the floor. The length of the cylinder is 3.4 m and its
1. 0 answers
2. 1,441 views
A copper cube, 0.31 m on a side, is subjected to two shearing forces, each which has a magnitude F = 6.40 106 N (see the
1. 1 answer
2. 1,005 views
Find the critical number of the function.g(t) = | 4t - 9 |
1. 1 answer
2. 506 views
At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.500 M.The balanced chemical
1. 0 answers
2. 634 views
If a 4.30 M sample of A is heated to 500 K, what is the concentration of B at equilibrium?A(aq) --><--- 2B(aq) Kc=8.54 x 10^-6
1. 1 answer
2. 786 views
At a certain temperature, the Kp for the decomposition of H2S is 0.755H2S (g) <-- --> H2 (g) + S (g) Initially, only H2S is
1. 0 answers
2. 577 views
Phosphorus pentachloride decomposes according to the chemical equationPCl5(g) ⇌ PCl3(g) + Cl2(g) A 0.304 mol sample of PCl5(g)
1. 0 answers
2. 693 views
At a certain temperature, the equilibrium constant for the following chemical equation is 2.00. At this temperature, calculate
1. 1 answer
2. 3,791 views
The drawing shows a sulfur dioxide molecule. It consists of two oxygen atoms and a sulfur atom. A sulfur atom is twice as
1. 1 answer
2. 1,603 views
lim_(x->0^+)(tan(9x))^x
1. 0 answers
2. 395 views
How many grams are in 4.00mol of sodium chloride (\rm NaCl)
1. 1 answer
2. 397 views
If the half-life of a radionuclide is 1 month, is a sample of it completely decayed after 2 months?
1. 2 answers
2. 1,911 views
What physical quantities are governed by the quantum numbers of an atomic electron?.
1. 1 answer
2. 893 views
A half-atwood machine is constructed, as shown in the drawing below. The table is NOT frictionless, M1 is 50 grams, and M2 is 30
1. 1 answer
2. 515 views
Differentiate the function.f(x) = sin(x) ln(2x)
1. 1 answer
2. 1,050 views
Use Newton's method with the specified initial approximation x1 to find x3, the third approximation to the root of the given
1. 0 answers
2. 571 views
Verify the given linear approximation ata = 0. Then determine the values of x for which the linear approximation is accurate to
1. 2 answers
2. 1,207 views
Verify the given linear approximation ata = 0. Then determine the values of x for which the linear approximation is accurate to
1. 1 answer
2. 5,595 views
Find the linearization L(x) of the function at a.f(x) = x^4/5, a = 32
1. 1 answer
2. 1,670 views
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during
1. 0 answers
2. 691 views
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during
1. 0 answers
2. 1,146 views
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during
1. 0 answers
2. 663 views
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during
1. 0 answers
2. 1,206 views
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during
1. 0 answers
2. 537 views
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during
1. 0 answers
2. 1,065 views
A ladder (L = 7.80 m) of weight WL = 360 N leans against a smooth vertical wall. The term "smooth" means that the wall can exert
1. 1 answer
2. 1,152 views
Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle θ. A car can safely
1. 1 answer
2. 6,097 views
If Kf = 1.86C/m, how many grams of calcium chloride must be added to 1.0L of water (assume a density of 1.0 g/mL) to lower the
1. 7 answers
2. 725 views
Imagine two solutions with the same concentration and the same boiling point.?Imagine two solutions with the same concentration
1. 2 answers
2. 9,829 views
A solution is made by mixing 37.0 mL of ethanol, C2H6O, and 63.0 mL of water.?Assuming ideal behavior, what is the vapor
1. 3 answers
2. 2,186 views
Find the number of each kind of object in the collectionMiranda has 24 CDs in her collection. Of those CDs, 10 are pop CDs. She
1. 2 answers
2. 1,728 views
Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle θ. A car can safely
1. 0 answers
2. 1,442 views
A kite is hovering over the ground at the end of a straight 47-m line. The tension in the line has a magnitude of 14 N. Wind
1. 0 answers
2. 882 views
The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone
1. 2 answers
2. 4,228 views
Isoamyl salicylate (м = 208.25 g/mol) has a pleasant aroma and is used in perfumes and soaps. Which of the following
1. 1 answer
2. 1,187 views
Explain how you would prepare 100.0 mL of 0.500 M NaCl solution. Include the appropriate glassware and calculations.
1. 1 answer
2. 1,535 views
A two digit number has the property that the units digit is 4 less than the tens digit and the tens digit is twice the units
1. 2 answers
2. 1,804 views
A model rocket launches with an initial velocity of 6 m/s, at an angle of 90 degrees (with respect to the horizon). The rocket's
1. 1 answer
2. 645 views
A spacecraft is on a journey to the moon. At what point, as measured from the center of the earth, does the gravitational force
1. 0 answers
2. 818 views
The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force SM that the sun exerts on
1. 0 answers
2. 827 views
The weight of an object is the same on two different planets. The mass of planet A is only forty-five percent that of planet B.
1. 2 answers
2. 7,666 views
A rocket of mass 4.5 105 kg is in flight. Its thrust is directed at an angle of 45.5° above the horizontal and has a magnitude
1. 0 answers
2. 1,297 views
I have to write an satire and I am doing it on the movie The Help.
1. 1 answer
2. 432 views
A hot-air balloon is rising straight up with a speed of 6 m/s. A ballast bag is released from rest relative to the balloon at 7
1. 0 answers
2. 580 views
In a marathon race, Chad is out in front, running due north at a speed of 3.92 m/s. John is 92 m behind him, running due north
1. 1 answer
2. 1,447 views
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a
1. 2 answers
2. 4,011 views
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a
1. 0 answers
2. 514 views
A puck is moving on an air hockey table. Relative to an x, y coordinate system at time t = 0 s, the x components of the puck's
1. 0 answers
2. 560 views
As a tennis ball is struck, it departs from the racket horizontally with a speed of 28.2 m/s. The ball hits the court at a
1. 1 answer
2. 933 views
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.050 s, during which
1. 0 answers
2. 735 views
A meteoroid is speeding through the atmosphere, traveling east at 19.0 km/s while descending at a rate of 12.9 km/s. What is its
1. 0 answers
2. 490 views
The company policy for customer service representatives gives time off for positive reviews. If, in the first 20 calls a
1. 0 answers
2. 527 views
The label on a prescription bottle directs the patient to take the medicine twice a day. The effective ingredient of the
1. 1 answer
2. 1,108 views
What is the type of glycosidic bond in case alpha?
1. 0 answers
2. 708 views

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