Marta

This page lists questions and answers that were posted by visitors named Marta.

Questions

The following questions were asked by visitors named Marta.

A mixture contains only NaCl and Fe(NO3). A 0.456g sample of the mixture is dissolved in water, and an excess of NaOH is added, producing a precipitate of Fe(OH)3. The precipitate is filtered, dried and weighed. Its mass is 0.107g. Calculate the following...

Can someone help me with this problem? Find f if f''(x) = x^-2, x>0, f(1)=0, and f(2)=0. I tried using antiderivatives but I realized I couldn't take the antiderivative of x^-1.

Graph the equation. The graph will divide the coordinate plane into four reqions. Write a system of inequalities that describe each region. Labe the region with these inequalities. 1) y = x - 3 y = 9 - x I already graphed it, I only need help on writing t...

How can NH3 be a ligand but NH4+ is not a ligand??

Solve A contractor finds that it takes a crew A 6 hours to construct a wall of a certain size. Crew B takes 8 hours to construct a wall of the same size. How long will it take if they work together?

Solve One boat travels 10km/h faster than another. Which one boat travels 120 km, the other travels 155 km. Find their speeds.

Solve The reciprocal of two more than a number in three times the reciprocal of the number. Find the number

What is the relationship of the two lines with the equations -3y=x-6 and y=3x+1? I am very confused. Please explain how you got your answer!

If it takes 20 h to convert 100 g of reactant A to product C at 20 degrees Celcius, approximately how many minutes would it take at 90 degrees Celcius? (a formula for this would be so helpful) Thanks!

If a reaction takes 8 hours at 20 degrees celcius, how long will the reaction take at 50 degrees celcius? (Please answer in # of hours) A formula would be so helpful! thanks!

Find the inverse of the function y=log8 x

what is the term for european nations seek colonies during World war one?

Hi, I have answered some questions for some homework and I've got one of them wrong. I cannot modify my answer but I would really love to know why my answer is wrong. This is the statement of the problem: n this series of questions, we examine data from a...

Two figures are similar with a similarity ratio of 4 and one side of the figure is 3 cm long. Find the lenght of the side of the similar figure. I don't really know if I have to try to do it like an equation or if there's a formula for this. Sorry if anyt...

which property is shown by -6+0=-6 -commutative property of addition*** -identity property of addition -distributive property -associative property of addition can someone please tell me if im right

Answers

The following answers were posted by visitors named Marta.

perpendicular! thank you so much!

Hi Bobpursley, Thank you very much for your answer... The problem is that I do not have any data on whether the boys got shots more frequently than girls enfants or whether boy babies whine more than girls... I guess those could be an explanation if I had...

For anyone looking at the response, I think it should be 1-cosθ, not 1+cosθ.

d. all of the other factors are likely to produce a significant result

I actually did that but I thought it was really simple and easy, haha. Thank you so much.

its okay I got it, it identity property of addition

I know the answer, but I don't know what is the pattern

Xyz companscostfunctionforthenextfourmonths,is C=500000+5Q