David wants to find 3/10 + 21/100 and is wondering if using decimals can him make sense of adding fractions.

a. 0.30 and 0.21

B. 30/100 and 21/100

C. 30/100 hope this helps!!

Step-by-step explanation:

b. 24 mm

step-by-step explanation:

use the pythagorean theorem.

a^2 + b^2 = c^2

a^2 + 7^2 = 25^2

a^2 + 49 = 625

a^2 = 576

a = 24

answer: b. 24 mm

multiply length by height. multiply the length by the height, and then double the product. work out 10 x 10 results = 100 square inches, then work out 100 x 2 = 200. the answer is 200 square inches.

step-by-step explanation: