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PIT_PIT [208]
3 years ago
11

I need help with question 12

Mathematics
1 answer:
Llana [10]3 years ago
3 0
 the answer is b.............................................
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Simplify the exponential expression.
Sever21 [200]

Answer:

1

Step-by-step explanation:

Well you could use the exponential identity that: \frac{x^a}{x^b}=x^{a-b}

To determine: \frac{h^3}{h^3}=h^{3-3}

Which means that it's equal to: h^0

and since anything to the power of 0 (except 0) is equal to 1, then the value is 1.

But you can also just see that the numerator and denominator are the same exact value, and since dividing something by it self, results in 1, the answer must be 1, which is kind of a proof as to why h^0 = 1.

3 0
1 year ago
Read 2 more answers
In a set of real numbers, the first number less then -3 is -4<br> true <br> or<br> false
Annette [7]

Answer:

true

Step-by-step explanation:

the bigger the number of a negative integer, the smaller the value become

8 0
4 years ago
Read 2 more answers
shawna can pour a large concrete driveway in six hours . Dan can pour the same driveway in seven hours. Find how long it would t
liberstina [14]

work in  rates per hour :-

1/6 + 1/7 = 1/x

 Multiply through by the LCD,  42x:-

7x +  6x =  42

x = 42 / 13 = 3.23 hours answer

or about 3 hours 14 minutes

8 0
4 years ago
the perimeter of the flower garden is 30 feet. If the width of the flower garden is 3 feet, what is the length?
nadezda [96]

Answer:

12 feet

Step-by-step explanation:

First, you should know that perimeter is equal to the sum of all the sides. If the flower garden is a rectangle, the width on the other side is also 3. 3+3 equals 6. Next, subtract 6 from 30 to get 24. Now, divide 24 by 2 to get the length of 1 side. 24/2 equals 12. So the length is 12 feet

5 0
3 years ago
Suppose your statistics professor reports test grades as​ z-scores, and you got a score of 2.492.49 on an exam. ​a) Write a sent
kolezko [41]

Answer:

a) Option C) The score was 2.49 standard deviations higher than the mean score in the class.

b) 2.3%

Step-by-step explanation:

a) We are given that the distribution of test grades is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

\displaystyle\frac{x-\mu}{\sigma} = 2.49\\\\x - \mu = 2.49\sigma\\x = \mu + 2.49\sigma

Option C) The score was 2.49 standard deviations higher than the mean score in the class.

b) The z-score for a particular score is -2.

We have to evaluate

P(z < -2)

Calculating the value from normal z-table.

P(z < -2) = 0.023

Thus, 2.3% of  of the class scored lower than my​ friend.

6 0
3 years ago
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