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3 years ago

Which function has a domain of (-∞, ∞) and a range of (-3, ∞)?

Mathematics

1 answer:

shtirl [24]3 years ago

5 0

Answer:

Step-by-step explanation:

The function that will have the domain $(\infty, \infty)$ and a range of $(-3, \infty)$ is the

function in option d.) $f(x) = e^x - 3$

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A college football coach has decided to recruit only the heaviest 15% of high school football players. He knows that high school

Alla [95]

Answer:

The coach should start recruiting players with weight 269.55 pounds or more.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 225 pounds

Standard Deviation, σ = 43 pounds

We are given that the distribution of weights is a bell shaped distribution that is a normal distribution.

Formula:

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

We have to find the value of x such that the probability is 0.15

$P( X > x) = P( z > \displaystyle\frac{x - 225}{43})=0.15$

$= 1 -P( z \leq \displaystyle\frac{x - 225}{43})=0.15$

$=P( z \leq \displaystyle\frac{x - 225}{43})=0.85$

Calculation the value from standard normal z table, we have,

$P(z < 1.036) = 0.85$

$\displaystyle\frac{x - 225}{43} = 1.036\\\\x = 269.548 \approx 269.55$

Thus, the coach should start recruiting players with weight 269.55 pounds or more.

3 0

3 years ago

PLZ HELP 10 POINTS FOR THIS QUESTION PLZ PLZ

Nookie1986 [14]

Answer:

Tried my best..... Hope it helps! :)

5 0

3 years ago

I need help with this ASAP!! Please and thank you..

Allushta [10]

Answer: a) 8%

b) 34%

c) 12%

<u>Step-by-step explanation:</u>

$a)\quad \dfrac{January\ Clothing}{January\ Payments}=\dfrac{234.75}{2800.00}=0.083\implies \large\boxed{8\%}\\\\\\b)\quad \dfrac{January\ Housing}{January\ Payments}=\dfrac{945.20}{2800.00}=0.337\implies \large\boxed{34\%}\\\\\\c)\quad \dfrac{January\ Transportation}{January\ Payments}=\dfrac{347.46}{2800.00}=0.124\implies \large\boxed{12\%}$