Please help

a. Is 36 a perfect square? How do you know?

b. Is 44 a perfect square? How do you know?

c. List all perfect squares between 0 and 400.

a. 36 is a perfect square because 6*6=36

b. 44 is not a perfect square because we cannot get 44 by multiplying the same two numbers. I so we need to do squre root 36 is less than 44 and squreroot 49 is greater than 44

6.6* 6.6 = 43. 56 which is near to 44

c. 4, 9,16 ,25,36,49,56,81,100,121,144,169,196,225,256,289,324,361,400

d (5 x (-20)) * (100 x (0.7))

step-by-step explanation:

5÷1/100 * -.7 *-20

copy dot flip

5*100 * -.7 *-20

rearrange

5*-20   * 100 *-.7

-100   *-70

7000