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3 years ago

Simplify 12 to the 3rd over 12 to the 7th.

Mathematics

2 answers:

Ganezh [65]3 years ago

6 0

$\dfrac{12^3}{12^7}=\dfrac{12^3}{12^3\cdot 12^4}=\dfrac{12^3}{12^3}\cdot \dfrac{1}{12^4}\\\\=\dfrac{1}{12^4}$

The 2nd choice is appropriate.

jeka943 years ago

5 0

Answer:

The answer is b i took the test like literally 5 min ago

Step-by-step explanation:

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How do i answer these?

deff fn [24]

Answer:

1. distributive

2. associative

Step-by-step explanation:

In the first one, they are distributing 16 + 23 by the 4.

Therefore it is distributive property as they are splitting and then separately multiplying.

In the second one, the parentheses are shifted. The shifting of parentheses indicates priority, and the associative property says in addition you can choose what you'd like to do first and it won't change the answer.

8 0

3 years ago

Read 2 more answers

A motorboat takes

leva [86]

108 miles 3 hours = 36 mph upstream
108 miles 2 hours = 54 mph downstream

bv = boat velocity in still water
cv = current velocity

bv -cv = 36
bv +cv = 54 Adding both equations

2*bv = 90

boat velocity in still water = 45 mph

since bv + cv = 54
then we know the current velocity = 9 mph

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4 years ago

Pure acid is to be added to a 10% acid solution to obtain 99L of a 20% acid solution. which amounts of each should be used ?

Leni [432]

Answer:

x = amount of 100% acid solution (pure acid, no water)

y = amount of 10% acid solution (acid + water)

both amounts are in liters

Step-by-step explanation:

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3 years ago

Write an equation that represents the line. Use exact numbers.

Sergio039 [100]

Answer:

6/5 is the slope, so x=6/5+2.5y

Step-by-step explanation:

I think

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3 years ago

Suppose you are conducting a study to compare firefly populations exposed to normal daylight/darkness conditions with firefly po

HACTEHA [7]

Answer:

a) This is an experiment, since one of the variables is being controlled. The light exposure is set to work 24h a day, this is done because the researcher has made a choice. In an observational study, the researcher has no control over the variables, so no changes happen with the sample groups. Some notes are taken about their behavior, but there isn't any element that is being manipulated.

b) The control group is the one in which the fireflies keep their usual routine, there aren't any changes in their environment. This is the population exposed to normal daylight/darkness. The treatment group is the one in which the fireflies live under different conditions from what they are used to, being this the ones that are exposed to continuous light 24h/day.

c) The variable of interest in this study is the rate of survival after continuous light exposure compared to natural light exposure. The level of measurement used is ratio scale, then, since the question being made with this research is "how many individuals are going to survive?". Ratio scales allow reserachers to count concrete data.

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3 years ago