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2 years ago

Rita takes 3 h to type a report. What part of typing can she do in 2 h? in x h?

Mathematics

1 answer:

GalinKa [24]2 years ago

7 0

Answer:

Solution: Part = 2/3 part

Step-by-step explanation:

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A company rents riding equipment for a fixed amount plus a fee based on the number of days for which the equipment is rented. Th

nikklg [1K]

The answer is 6. I know that because I solved the question and I got 6 I'm positive its 6. Hope this helps.

7 0

2 years ago

Read 2 more answers

A department store has daily mean sales of $28,372.72. The standard deviation of sales is $2000. On Tuesday, the store sold

DiKsa [7]

Answer:

Tuesday z-score was 3.26.

Tuesday was a significantly good day.

Step-by-step explanation:

Problems of normally distributed samples 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.

A score is said to be significantly high if it has a z-score higher than 1.64, that is, it is at least in the 95th percentile.

In this problem, we have that:

$\mu = 28372.72, \sigma = 2000$

On Tuesday, the store sold $34,885.21 worth of goods. Find Tuesday's z-score.

This is Z when $X = 34885.21$

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

$Z = \frac{34885.21 - 28372.72}{2000}$

$Z = 3.26$

Tuesday z-score was 3.26.

Was Tuesday a significantly good day?

A z-score of 3.26 has a pvalue of 0.9994. So only 1-0.9994 = 0.0006 = 0.06% of the day are better than Tuesday.

So yes, Tuesday was a significantly good day.

8 0

2 years ago

What is the value of x in the equation x - y = 30, when y = 15?<br> 8<br> 80<br> 200

bearhunter [10]

Answer:

$x=45$

Step-by-step explanation:

$x-15=30$

$x=30+15$

$x=45$

4 0

3 years ago

Read 2 more answers

The nth term of a sequence is n^2+20 A) work out the first three terms of the sequence B) how many terms in the sequence are les

a_sh-v [17]

<h3>♫ - - - - - - - - - - - - - - - ~<u>Hello There</u>!~ - - - - - - - - - - - - - - - ♫</h3>

➷ a) (1)^2 + 20 = 21

(2)^2 + 20 = 24

(3)^2 + 20 = 29

b) (5)^2 + 20 = 45

(6)^2 + 20 = 56

There are 5 terms less than 50

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

3 0

2 years ago

The exact value of cos 17pi/8 is . . a) square root of 2+the square root of 2/4 . b.) 0.38. c.) 0.99. d.)square root of 2-the sq

alexgriva [62]

Cos(17pi/8)

cos(17π/8)

But π radians = 180°

17π/8 radians = (17/8) * 180 = 382.5

But this is more than 360°, so we have the basic angle by subtracting 360°

382.5 - 360 = 22.5

cos(17π/8) = Cos22.5

Recall double angle formula for cos.

cos2θ = 2cos²θ - 1

Therefore

cos(2*22.5) = 2cos²(22.5) - 1

cos45 = 2cos²(22.5) - 1

(√2)/2 = 2cos²(22.5) - 1

2cos²(22.5) - 1 = (√2)/2

2cos²(22.5) = (√2)/2 + 1

2cos²(22.5) = (2 + √2) / 2

cos²(22.5) = (2 + √2) / 4

cos22.5 = √( (2 + √2)/4) ................(note)

cos22.5 = √(2 + √2) / 2

Option (a) seems like the closest, comparing to (note) above.

7 0

2 years ago