I am trying to complete this questionbthe question below, but I am not sure how to simplify the radical. What I have so far is
$(5.8\sqrt{40} + 56.4) - (5.8\sqrt{10} + 56.4$) = the difference$$(5.8\sqrt{40} + 56.4) - (5.8\sqrt{10} + 56.4) \;=\; \text{the difference}$$
How does one simplify this expression without a calculator?
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The formula $E = 5.8\sqrt{x} + 56.4$ models the projected number of elderly americans ages 65-84, E, in millions, x years after 2020.
a. Use the formula to find the projected increase in number of Americans ages 65.84, in millions from 2030 to 2060. Express this difference in simplified radical form.
b. Use a calculator and write your answer in part (a) to the nearest tenth.
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The formula $E = 5.8\sqrt{x} + 56.4$ models the projected number of elderly Americans ages $65$-$84$, $E$, in millions, $x$ years after $2020$.
a. Use the formula to find the projected increase in number of Americans ages $65.84$, in millions from $2030$ to $2060$. Express this difference in simplified radical form.
b. Use a calculator and write your answer in part (a) to the nearest tenth.
