With math
with multiplying monomials

answer: 5. -16r^7

9. 30t^6 v ^10

step-by-step explanation:

5. -16r⁷

7. 55w⁷x⁴

9. 30t⁶v¹⁰

step-by-step explanation:

according to the product-to-power exponential rule, whenever you multiply terms with exponents and coefficients, you add the exponents.

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56

step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.