Which of the following is a prime number between 20 and 30? A.
27
B.
21
C.
25
D.
23

D. 23

Step-by-step explanation:

Prime numbers are numbers that have only 2 factors; 1 and themselves. Basically, you can only divide the number by one or itself.

23 is the only number listed between 20 and 30 that is a prime number, as it does not have any other factors other than 1 and 23.

Hope this helps!

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,