The circumference of a circle is calculated using the formula C = 2πr, where r is the radius of the circle.
Given the radius is 18 in, we substitute r = 18 into the formula:
C = 2π(18)
C = 36π
Therefore, the circumference of the circle with a radius of 18 in is 36π inches.
34.
Find the circumference of a circle with radius of 18 in. Leave your answer in terms of .
18 in.
324 in.
36 in.
54 in.
5 answers
35.
Find the distance between points P(4, 6) and Q(8, 9) to the nearest tenth.
25
19.2
5
7
Find the distance between points P(4, 6) and Q(8, 9) to the nearest tenth.
25
19.2
5
7
To find the distance between two points (x1, y1) and (x2, y2), you can use the distance formula:
Distance = √((x2 - x1)^2 + (y2 - y1)^2)
Given the points P(4, 6) and Q(8, 9), plug in the coordinates:
Distance = √((8 - 4)^2 + (9 - 6)^2)
Distance = √(4^2 + 3^2)
Distance = √(16 + 9)
Distance = √25
Distance = 5
The distance between points P(4, 6) and Q(8, 9) is 5 units. So the answer is 5.
Distance = √((x2 - x1)^2 + (y2 - y1)^2)
Given the points P(4, 6) and Q(8, 9), plug in the coordinates:
Distance = √((8 - 4)^2 + (9 - 6)^2)
Distance = √(4^2 + 3^2)
Distance = √(16 + 9)
Distance = √25
Distance = 5
The distance between points P(4, 6) and Q(8, 9) is 5 units. So the answer is 5.
36.
Alfred is practicing typing. The first time he tested himself, he could type 30 words per minute. After practicing for a week, he could type 33 words per minute. After two weeks he could type 36 words per minute. Based on this pattern, predict how fast Alfred will be able to type after four weeks of practice.
42 words per minute
39 words per minute
36 words per minute
46 words per minute
Alfred is practicing typing. The first time he tested himself, he could type 30 words per minute. After practicing for a week, he could type 33 words per minute. After two weeks he could type 36 words per minute. Based on this pattern, predict how fast Alfred will be able to type after four weeks of practice.
42 words per minute
39 words per minute
36 words per minute
46 words per minute
The pattern from the given information is that Alfred's typing speed is increasing by 3 words per minute each week.
After 1 week: 30 words per minute
After 2 weeks: 30 + 3 = 33 words per minute
After 3 weeks: 33 + 3 = 36 words per minute
After 4 weeks: 36 + 3 = 39 words per minute
Therefore, based on this pattern, Alfred will be able to type 39 words per minute after four weeks of practice. The correct answer is 39 words per minute.
After 1 week: 30 words per minute
After 2 weeks: 30 + 3 = 33 words per minute
After 3 weeks: 33 + 3 = 36 words per minute
After 4 weeks: 36 + 3 = 39 words per minute
Therefore, based on this pattern, Alfred will be able to type 39 words per minute after four weeks of practice. The correct answer is 39 words per minute.