C. $340 you would add the money up and then subtract both checks he wrote which is $341 and the nearest 10 would be $340
D. $500 the same step as the last but don’t subtract friday which would be $497 and the closest 10 is $500
Given that h = 2,
h + h = 2 + 2
h + h = 4
Answer: h = 4
Answer: 
Step-by-step explanation:

Subtract 20x

add 15

Combine like terms

Divide by -25 (NOTE: When dividing or multiplying by negative numbers the inequality sign flips.)

Surface area of a cube = 6l²
Now given length = l = 8 mm
= 6*8² = 6*64 = 384 mm².
Thank you !!