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nignag [31]
3 years ago
6

Please help, will grant brainliest if correct, need now!!

Mathematics
1 answer:
Mama L [17]3 years ago
3 0

Answer:

- 7

Step-by-step explanation:

The average rate of change of f(x) in the closed interval [ a, b ] is

\frac{f(b)-f(a)}{b-a}

Here [ a, b ] = [ - 5, - 2 ]

f(b) = f(- 2) = (- 2)² - 4 = 4 - 4 = 0

f(a) = f(- 5) = (- 5)² - 4 = 25 - 4 = 21, thus

average rate of change = \frac{0-21}{-2-(-5)} = \frac{-21}{3} = - 7

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Ken is 6 feet tall and is walking away from a streetlight. The streetlight has its light bulb 14 feet above the ground, and Ken
AlekseyPX
Ken's distance is:  d(t)=1.7t

Ken's shadow is:

(14-6)/d(t)=14/s

8/d(t)=14/s

s=14d(t)/8

s=1.75d(t) and using the value for d(t) we have:

s=1.75(1.7t)

s=2.975t  and if you want it in terms of d, d=1.7t, t=d/1.7 so

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5 0
3 years ago
Carlos bought a $235 water heater with his credit card. He used the water heater for five years before replacing it. He paid off
Mazyrski [523]

First we will find the interest on:


P = $235 principal


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I = A - P the interest


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the interest was $71.21.



Next lets find the lifetime cost value:


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<span>← Previous Problem<span>Next Problem →</span></span>
3 0
3 years ago
Describe how the variability of the distribution changes as the sample size increases. As the sample size increases, the variabi
wolverine [178]

Answer:

As the sample size increases, the variability decreases.

Step-by-step explanation:

Variability is the measure of actual entries from mean.  The less the deviations the less would be the variance.

For a sample  of size n, we have by central limit theorem the mean of sample follows a normal distribution for random samples of large size.

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Hence as sample size increases, std error decreases.

As the sample size increases, the variability decreases.

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3 years ago
Find the product. (-3ab 2)3 27ab -23a2b2 -9a3b5 -27a3b6
horsena [70]

Answer:

Step-by-step explanation:

(-3 ab²)³=(-3)³(a)³(b²)³=-27 a³b^(2×3)=-27 a³b^6

8 0
3 years ago
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7. Fred had 85 marbles. After a few games, he had 120% of his original number. How many
Gnoma [55]

Answer:

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Hope that helps!

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3 years ago
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