Help I’ve been having trouble with this problem

Mathematics

1 answer:

lorasvet [3.4K]4 years ago

5 0

Ive done this problem but with a different velocity. Just plug in the numbers/information they give you into the equation and solve for t. The value for t will be your answer

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Which number(s) below belong to the solution set of the inequality? Check all that apply.9x 117

satela [25.4K]

F d and b are your answers

4 0

4 years ago

The angle of elevation from a kicker's foot on the football field to the top of the goal post is 17 degrees. If he is standing 1

vovangra [49]

Answer:

The goal post is 40.05 feet tall.

Step-by-step explanation:First, you need to decide whether to use sin, tan or cos.

You have the angle, the adjacent and need the opposite , so you need to find out which one has all three values in

Sin

Cos

Tan

So you need to use tan.

Tan = opposite / adjacent, so rearrange the formula to make opposite the subject:

[tex]Opp = Tan * adj

So simply plug these values in:

[tex]Opp =131 * tan(17) = 40.05

So the goal post is 40.05 feet tall

8 0

3 years ago

he blood platelet counts of a group of women have a bell-shaped distribution with a mean of 247.3 and a standard deviation of 6

Ulleksa [173]

Answer:

The approximate percentage of women with platelet counts within 3 standard deviations of the mean is 99.7%.

Step-by-step explanation:

We are given that the blood platelet counts of a group of women have a bell-shaped distribution with a mean of 247.3 and a standard deviation of 60.7.

Let X = the blood platelet counts of a group of women

The z-score probability distribution for the normal distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

where, $\mu$ = population mean = 247.3

$\sigma$ = standard deviation = 60.7

Now, according to the empirical rule;

68% of the data values lie within one standard deviation of the mean.

95% of the data values lie within two standard deviations of the mean.

99.7% of the data values lie within three standard deviations of the mean.

Since it is stated that we have to calculate the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 65.2 and 429.4, i.e;

z-score for 65.2 = $\frac{X-\mu}{\sigma}$

= $\frac{65.2-247.3}{60.7}$ = -3