ANSWER

EXPLANATION
The exponential function that models cell duplication in the lab is given as

We want to determine the time it will take for the cells to increase to

In other words, we want to find the value of

when

This gives us the equation,

Recall that,

We apply this property to the right hand side to obtain,

This implies that,

We divide both sides by 4 to get,

We take the antilogarithm of both sides to base 10 to get,

This implies that,

to the nearest hundredth.
Step-by-step explanation:
Original Price = $499
100% of something is the original price. when you mark something up, you are increasing the price. when the clerk marks up merchandise by 28%, they are increasing the price by 28%.
This means that the price is original + markup = 100 + 28 = 128%
Therefore, the retail price is
499 x 128% = $638.72
Answer:
VZSYJDGAOYUGFOIUdgfwoiy6tqswEWRFWQEWRAQE
Step-by-step explanation:
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Let x be this number:
4 times this number = 4x
3 times this number = 3x
Difference = 4x - 3x = x