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3 years ago

To be honest this is a dud question just answer for points and if multiple people answer I will give one of them brainliest.

Mathematics

1 answer:

MArishka [77]3 years ago

6 0

Answer:

If you live to be 70, you will have spent 10 years of your life on Monday.

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tim has $45. he buys pens that cost 2.75 each until he has only 12.00 left. if x represents the number of pens purchased.. write

aliya0001 [1]

Solve this equation: $45 - ($2.75/pen)x = $12. Simplifying, we get

$33 = ($2.75)x, so that

x = $33 / ($2.75) = 12.

Tim's buying 12 pens leaves him with $12.

6 0

3 years ago

Read 2 more answers

According to survey data, the distribution of arm spans for males is approximately Normal with a mean of 71.4 inches and a stan

Gekata [30.6K]

Answer:

a) 89.97% of men have arm spans between 66 and 76 inches.

b) The z-score for this person's arm span is 5.68. 0% of males have an arm span at least as long as this person

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be 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.

Mean of 71.4 inches and a standard deviation of 3.1 inches.

This means that $\mu = 71.4, \sigma = 3.1$

a. What percentage of men have arm spans between 66 and 76 inches?

The proportion is the pvalue of Z when X = 76 subtracted by the pvalue of Z when X = 66. The percentage is the proportion multiplied by 100.

X = 76

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

$Z = \frac{76 - 71.4}{3.1}$

$Z = 1.48$

$Z = 1.48$ has a pvalue of 0.9306

X = 66

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

$Z = \frac{66 - 71.4}{3.1}$

$Z = -1.74$

$Z = -1.74$ has a pvalue of 0.0409

0.9306 - 0.0409 = 0.8997

0.8997*100% = 89.97%

89.97% of men have arm spans between 66 and 76 inches.

b. A particular professional basketball player has an arm span of almost 89 inches. Find the z-score for this person's arm span. What percentage of males have an arm span at least as long as this person?

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

$Z = \frac{89 - 71.4}{3.1}$

$Z = 5.68$

The z-score for this person's arm span is 5.68.

Z = 5.68 has a pvalue of 1

1 - 1 = 0

0% of males have an arm span at least as long as this person

8 0

3 years ago

Allen weighs 44 kg. Miller weighs half as much as Allen, and James weighs 3 kg more than Miller. What is their weight all togeth

melamori03 [73]

Answer:

Step-by-step explanation:

we will call Allen : A

we will call MIller: M

we will call James: J

The problem tells us we have three answers we need to find and it only gives us one of those answers. We can use that to find the other needed answers. We will start with answering the first one.

A = 44

We know from the given A = 44 so miller is half the weight we divide by 2.

A/2 = M

44/2 = 22 so we know that M is = to 22

then the question tells us james is three more than miller. we know from solving miller is 22.

M + 3 = J

22+3 = J

J=25

then the final question asks to add all of them together

A + M + J = Total weight

44 + 22 + 25 = Total Weight

91 = Total Weight

7 0

4 years ago

A $10,000 loan is to be repaid with 7 equal half-yearly instalments, the first repayment being in

denis-greek [22]

Answer: $1,415.47

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

see spreadsheet below

8 0

4 years ago

Can someone please help with these problems?

NemiM [27]

Answer:

Its 70 TRUST

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers