Ask question

Ask question

All categories

PSYCHO15rus [73]

3 years ago

11

please help me! and please do not guess or just say something to take points bc i will make sure your account gets deleted. than

k you!! 20 points for answering

2 answers:

Gwar [14]3 years ago

4 0

Answer:

1. 3.

Step-by-step explanation:

The answer to tx2x365 is 730t so when you solve the others you also get 730t

borishaifa [10]3 years ago

4 0

I just wanna answer the answer is 1.3

You might be interested in

The product of two numbers is 4 2/9, if one of the number is 38, find the number

disa [49]

Answer:

let x and y be the two number then according to question ,

xy=4 2/9

or, xy= 38/9

if one of the number is 38 then,

38x=38/9

or, x= 1/9 is the correct ans.

5 0

3 years ago

IQ scores are known to be normally distributed. The mean IQ score is 100 and the standard deviation is 15. What percent of the p

Masja [62]

Answer:

47.06% of the population has an IQ between 85 and 105.

Step-by-step explanation:

Problems of normally distributed samples are 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.

In this problem, we have that:

$\mu = 100, \sigma = 15$

What percent of the population has an IQ between 85 and 105?

This is the pvalue of Z when X = 105 subtracted by the pvalue of Z when X = 85. So

X = 105

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

$Z = \frac{105 - 100}{15}$

$Z = 0.33$

$Z = 0.33$ has a pvalue of 0.6293.

X = 85

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

$Z = \frac{85 - 100}{15}$

$Z = -1$

$Z = -1$ has a pvalue of 0.1587

So 0.6293 - 0.1587 = 0.4706 = 47.06% of the population has an IQ between 85 and 105.

5 0

3 years ago

Let t = cosA + sinA<br> find values of t if <br> 2 - sin2A = 2(cosA + sinA)

Zinaida [17]

$2 - \sin(2A) = 2(\cos A + \sin A)\\\\2-2\sin A\cos A=2\cos A+2\sin A\\\\2\sin A\cos A+2\cos A+2\sin A-2=0\\\\1+2\sin A\cos A+2\cos A+2\sin A-3=0\\\\\sin^2 A+\cos^2 A+2\sin A\cos A+2\cos A+2\sin A-3=0\\\\(\sin A+\cos A)^2+2\cos A+2\sin A-3=0\\\\(\sin A+\cos A)^2+2(\cos A+\sin A)-3=0\\\\\\t^2+2t-3=0\\\\t^2+2t+1-4=0\\\\(t+1)^2=4\\\\t+1=2\qquad\vee \qquad t+1=-2\\\\\\\boxed{t=1\qquad\vee\qquad t=-3}$

When $A\in\mathbb{R}$

$t=\cos A+\sin A\in[-\sqrt{2};\sqrt{2}]\approx[-1.4142;1.4142]$

and there is only one answer t = 1.

For $A\in\mathbb{C}$ both values are correct.

4 0

4 years ago

A company sets sales goals for employees each month.

erma4kov [3.2K]

Answer:

A. Kristina will sell 294 items in 28 days if she stays on her current pace.

B. She is not on track to meet the goal.

Step-by-step explanation:

By doing the math she would only sell around 294 items by day 28 when she needs to sell around 400 to reach her goal. if she keeps this pace she won’t reach that goal unless she is able to bump up her weekly count by 2-5 items then she can either hit the goal or go over.

6 0

3 years ago

What is an example of interval notation?

lord [1]

When you have to nonation. something

8 0

3 years ago