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Mathematics

1 answer:

Gennadij [26K]3 years ago

6 0

Answer: B

Step-by-step explanation: Ez

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The distances in space are measured in light-years. The distance from Earth to a star is 5.9 × 1013 kilometers. What is the dist

eduard

The answer is: "6.2 light years" .
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{ <u>Note</u>: There are no answer choices provided. If there are supposed to be, then round to answer choice closest to " 6.2 light years ". }.
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Explanation:
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$(5.9 * 10^1^3 km) * ( \frac{1 light year}{9.46 *10^1^2 km}$ ;

= ( $\frac{5.9 * 10^1^3 km}{9.46 * 10^1^2 km}$ light years ;

= $\frac{5.9 km}{9.46 km} * (10^1^3^-^1^2)$ light years ;

= $\frac{5.9 km}{9.46 km} * (10^1)$ light years ;

= $\frac{5.9 km}{9.46 km} * (10)$ light years ;

= $\frac{5.9 km}{9.46 km} * (10)$ light years ;

= $\frac{5.9 km * 10}{9.46 km}$ light years ;

= $\frac{59 km}{9.46 km}$ light years ;

<u>Note</u>: We can "cancel out" BOTH of the units of "km" ;

→ {since: "km/km = 1 "} ; and rewrite:
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= $\frac{59}{9.46}$ light years ;

= " { 59 ÷ 9.46 } " light years ;

= 6.2367864693446089 light years.
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Round to "6.2 light years" ; since there are no answer choices provided.
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7 0

3 years ago

Evaluate the function for the given value.

maks197457 [2]

Answer:

$g(t) = 2 \cdot 0.4t \ for \ t = -2\\g(-2) = 2 * 0.4*-2 = -1.6$