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3 years ago

Please help me with this problems I’m having a headache with 1-8

Mathematics

2 answers:

Tamiku [17]3 years ago

6 0

a. If you go one higher with the exponent number (the number that's smaller next to the two), it's basically saying 2 * 2 (if you wanted to do 2^2). If you were to do 2^3, it would be 2*2*2, since exponents means you are multiplying the base number on the exponent number amount of times

b. 2^5 is 2 * 2 * 2 * 2 * 2, which is 4*4*2, making it 32. 2^6 is just 2^5 * 2, so 32 * 2 is 64

c. If you go down from 2^6, you just divide the number by two (or the base number if you were working with some other number)

d. To find 2^0, any number to the power of 0 is always one. If you wanted to find 2^-1, just divide 1 by the base number (which is 2 in this case) and you get 1/2.

ANTONII [103]3 years ago

3 0

Y=mx+b always
Your welcome

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An investment strategy has an expected return of 15 percent and a standard deviation of 9 percent. Assume investment returns are

IgorLugansk [536]

Answer:

68% of an investment earning a return between 6 percent and 24 percent.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 15

Standard deviation = 9

How likely is it to earn a return between 6 percent and 24 percent?

6 = 15 - 1*9

6 is one standard deviation below the mean

24 = 15 + 1*9

24 is one standard deviation above the mean

By the empirical rule, there is a 68% of an investment earning a return between 6 percent and 24 percent.

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3 years ago

Solve the equation using inverse operations. 18 = 2/5 y Enter your answer in the box. y =

Eva8 [605]

y = 45

multiply both sides by 5 to eliminate the fraction

90 = 2y ( divide both sides by 2 )

45 = y

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3 years ago

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fredd [130]

The mean is the average.
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3 years ago

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Genrish500 [490]

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3 years ago

Read 2 more answers

HELP

Reptile [31]

Answer:

The time it takes for the cannonball to hit the ground is 6.49 seconds.

Step-by-step explanation:

You know that the height of the cannonball above the ground, h, in meters, in time, t, in seconds, is found by the function h(t) = -4.9t² + 30.5t + 8.4. You want to calculate the time it takes for the cannonball to hit the ground, that is, the time it takes for the bullet to reach zero height. So, being h(t) = 0 you have:

0 = -4.9t² + 30.5t + 8.4

To solve a quadratic function 0=a*x² + b*x +c, the expression is applied:

$\frac{-b+-\sqrt{b^{2} -4*a*c} }{2*a}$

In this case, being a = -4.9, b =30.5 and c =8.4 you have:

$\frac{-30.5+-\sqrt{30.5^{2} -4*(-4.9)*8.4} }{2*(-4.9)}$

Solving you get:

t1= -0.26 seconds and t2=6.49 seconds

Since time does not have a negative value, then <u><em>the time it takes for the cannonball to hit the ground is 6.49 seconds.</em></u>

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3 years ago