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Zigmanuir [339]
3 years ago
12

The function f(x)=4(2)^x represent the number of people who share a cat video x hours after it first appears on a website. How d

oes the number of people sharing the video change each hour?
A.the number increases by 2 each hour.B. The number doubles each hour.C.the number increases by 4 each hour.D. The number increases by a factor of 4 each hour.
Mathematics
2 answers:
Travka [436]3 years ago
7 0

Answer:

B. The number doubles each hour.

Step-by-step explanation:

Our equation is

f(x) = 4(2)ˣ.

This equation is of the form

y = a(1+r)ˣ, where a is the initial value, r is the growth rate (as a percentage) and x is the number of time periods.

For our problem, the initial value is 4.  Since 1+r = 2, this means r = 1; this means the value increases by 100% each time.  This is the definition of doubling.

Harlamova29_29 [7]3 years ago
6 0

Answer:The number doubles each Hour Apex :)


Step-by-step explanation:


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Evaluate 9p^2 for p=4 . When p=4,9p^2=?
Licemer1 [7]

Answer:

  144

Step-by-step explanation:

Put the number where the variable is and do the arithmetic.

  9p^2 = 9·4^2 = 9·16

  9p^2 = 144 . . . . when p=4

6 0
3 years ago
an electric pole of height 25 m casts a shadow of 20 m.find the height of a tree, if it casts a shadow of 12 m under similar con
ikadub [295]

Answer:

9.6

Step-by-step explanation:

20 divided by 25 = 0.8

Then, 0.8 times 12 = 9.6

I bet that helped! :D

6 0
3 years ago
in 2018 GRE scores were normally distributed with a mean of 303, and standard deviation of 13. Standford University Graduate sch
eduard

Answer:

The minimum score needed to be considered for admission to Stanfords graduate school is 328.48.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 303, \sigma = 13

What is the minimum score needed to be considered for admission to Stanfords graduate school?

Top 2.5%.

So X when Z has a pvalue of 1-0.025 = 0.975. So X when Z = 1.96

Z = \frac{X - \mu}{\sigma}

1.96 = \frac{X - 303}{13}

X - 303 = 13*1.96

X = 328.48

The minimum score needed to be considered for admission to Stanfords graduate school is 328.48.

3 0
3 years ago
Part A: Rhett made $250 washing cars with his mobile car wash company. He charges $70 per car and earned $50 in tips. Write an e
Natasha2012 [34]

Answer:

250=70x+50

Step-by-step explanation:

5 0
3 years ago
How you know a fraction is less than 1/2
nikitadnepr [17]

The fraction will continue to be the same numerator "1". However the denominator will be a greater number. Such as 4. Then you will know it is broken into more peices (as being a greater number). These pieces will automatically be a smaller fraction.

So, in order to know if a fraction is less then 1/2, it will have a greater denominator.

hope this helps :)

5 0
3 years ago
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