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2 years ago

Jada & Zeke compare their monthly text message plans. Jada's plan costs $5 plus an additional $0.05 per text.

Mathematics

1 answer:

Nata [24]2 years ago

8 0

Answer:

t=100

Step-by-step explanation:

The easiest way is to graph them—otherwise, set each equation equal to each other:

.1x=.05x +5

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Use the points (2, 45) and (8, 90) to find the slope and y-intercept of the trend line for the data comparing hours studied to t

NARA [144]

Answer:

m= 7.5

b= 30

Step-by-step explanation:

4 0

2 years ago

The length of time Y necessary to complete a key operation in the construction of houses has an exponential distribution with me

Angelina_Jolie [31]

Answer:

Reference The length of time Y necessary to. ... construction of houses has an exponential distribution with mean 10 hours. The formula C = 100 + 40Y + 3Y 2 relates the cost C of completing this operation to ... Find the mean and variance of C. ... The length of time necessary to complete a key operation in the construction of ...

Step-by-step explanation:

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1 year ago

Let X represent the amount of time until the next student will arrive in the library parking lot at the university. If we know t

Ber [7]

Answer:

The probability that it will take more than 10 minutes for the next student to arrive at the library parking lot is 0.0821.

Step-by-step explanation:

The random variable X is defined as the amount of time until the next student will arrive in the library parking lot at the university.

The random variable X follows an Exponential distribution with mean, μ = 4 minutes.

The probability density function of X is:

$f_{X}(x)=\lambda e^{\lambda x};\ x\geq 0, \lambda >0$

The parameter of the exponential distribution is:

$\lambda=\frac{1}{\mu}=\frac{1}{4}=0.25$

Compute the value of P (X > 10) as follows:

$P(X>10)=\int\limits^{\infty}_{10}{0.25e^{-0.25x}}\, dx$

$=0.25\times \int\limits^{\infty}_{10}{e^{-0.25x}}\, dx\\=0.25\times |\frac{e^{0.25x}}{-0.25}|^{\infty}_{10}\\=(e^{-0.25\times \infty})-(e^{-0.25\times 10})\\=0.0821$

Thus, the probability that it will take more than 10 minutes for the next student to arrive at the library parking lot is 0.0821.

3 0

2 years ago

A park has a 333 meter (\text{m})(m)left parenthesis, start text, m, end text, right parenthesis tall tether ball pole and a 6.8

dybincka [34]

Answer:option B & D are correct

Step-by-step explanation:

Given options are

A B C D E

Tether ball pole shadow 1.35 1.8 3.75 0.6 2

Flagpole shadow 3.4 4.08 8.35 1.36 4.8

Ratio of corresponding height & shadows should be same

3 meter tall tether ball pole and a 6.8 tall flagpole

=> Ratio = 6.8/3 = 68/30 = 34/15

A - 3.4/1.35 = 340/135 ≠ 34/15( 306/135)

B - 4.08/1.8 = 408/180 = 34/15 = 34/15 ( Correct option)

C 8.35/3.75 = 835/375 = 167/75 ≠ 34/15( 170/75)

D 1.36/0.6 = 136/60 = 34/15 = 34/15 ( Correct option)

E 4.8/2 = 48/20 = 12/5 = 36/15 ≠ 34/15

option B & D are correct

6 0

2 years ago

Read 2 more answers

Which is more economical: purchasing the economy size of a detergent at 7 kilograms for $7.15 or purchasing the regular size a

Kruka [31]

Regular size saves $0.0003 per gram I think
someone pls fact check me

8 0

2 years ago