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3 years ago

Please help ,cant figure it out.

Mathematics

1 answer:

abruzzese [7]3 years ago

6 0

Answer:

B. √2^5

Step-by-step explanation:

(2^½. 2^¾)²

= 2¹ . 2^(1½)

= 2^(2½)

= 2^(5/2)

=√2^5

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On a 15 hour trip, Rob drove 35% of the time and Mark drove the remainder of the time. How many hours did Mark drive? Explain 9.

Zigmanuir [339]

Answer:

9.75 hours

Step-by-step explanation:

If Rob drove 35% of the time and Mark drove the remainder of the time, the total is 100 %

100-35 = 65

so Mark drove 65% of the time

The total time driven was 15 hours, so we multiply the total time driven by the percentage of time that Mark drove to find the number of hours that Mark drove.

15 * 65%

15*.65

9.75 hours

7 0

3 years ago

Makes de following combinet operations

Gnoma [55]

Hinges maybe idk lml?

5 0

3 years ago

Points B and C lie on line segment AD, with AB < AC. If AD = 76, CD = 24, and AB = BC, what is the value of BC?

Gemiola [76]

AD= AB+BC+CD
According to the question,
AB=BC
Then ,
AB+BC=2AB

76= 2AB + 24
52/2= AB = BC = 26.

7 0

3 years ago

Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.02 margin of er

Brrunno [24]

Answer: 2172

Step-by-step explanation:

Formula to find the sample size n , if the prior estimate of the population proportion(p) is known:

$n= p(1-p)(\dfrac{z^*}{E})^2$ , where E= margin of error and z* = Critical z-value.

Let p be the population proportion of adults have consulted fortune tellers.

As per given , we have

p= 0.20

E= 0.02

From z-table , the z-value corresponding to 98% confidence interval = z*=2.33

Then, the required sample size will be :

$n= 0.20(1-0.20)(\dfrac{2.33}{0.02})^2$

$n= 0.20(0.80)(116.5)^2$

$n= 2171.56\approx2172$

Hence, the required sample size = 2172

3 0

3 years ago

50 POINTSSSS! Use trigonometric identities to verify that this expression is equal.

Llana [10]

Answer:

= cos

Step-by-step explanation:

4 0

3 years ago

Please help ,cant figure it out. ​

Please help ,cant figure it out.