Answer:
(4 × 3) × 6 = 4 × (3 × 6) shows the Associative Property of Multiplication.
A healthy 140 pound boy needs between 2,000 to 2,400 calories a day.
Hope that helps :)
Answer:

Step-by-step explanation:
Given

Represent charges with d and time with h
So:
when 
Required
Determine the formula

In other words,

Convert to an equation

Where
k = constant of proportion
Substitute values for Charges and Time

Solve for k


Substitute 15 for k in 


<em>The above formula models the situation</em>
Answer:
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