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3 years ago

Pls help will give brainlist

Mathematics

1 answer:

gulaghasi [49]3 years ago

7 0

What’s the question...

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Compare each set of numbers using <, > or<br>3.082 x 105<br>4.13 x 103<br>Select one<br>m

Darya [45]

Answer:

$4.13 \times 103 > 3.082 \times 105$

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3 years ago

approximate the integral 0 to pi/2 xsin(x)dx by computing the Left and Right sums, using the parition (0, pi/6, pi/4, pi/3, pi/2

Cerrena [4.2K]

3.14 times all will give you the answer

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3 years ago

You want to estimate the proportion of kids between the ages of 12 and 15 who have tried marijuana. You take a random sample of

kirill115 [55]

<h2>Answer with explanation:</h2>

Let p represents the population proportion.

By considering the given information, we have

$H_0: p=0.29\\\\H_a: p\neq0.29$

∵ the alternative hypothesis is two tailed , so the test is two-tailed test.

Given : For sample size :n= 130, $\hat{p}=0.23$

Test statistic: $z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

$z=\dfrac{0.23-0.29}{\sqrt{\dfrac{0.29(1-0.29)}{130}}}\\\\=-1.50762993902\approx-1.51$

P-value (two -tailed test)= $2P(z>|-1.51|)=0.1310434\approx 0.131$

Since , the p-value (0.131) is greater than the significance level (0.03), so we accept the null hypothesis.

Thus , we conclude that we have sufficient evidence to support the null hypothesis that the true population proportion of Maryland students who have smoked marijuana is 29% .

5 0

3 years ago

Kira decorates the exterior faces of a gift box in the shape of a cube .What is the surface area in square inches of the gift bo

Gekata [30.6K]

Answer:

The surface area of the gift box that Kira decorates is $253.5\ in^{2}$

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

A cube has six square faces

The surface area of a cube is equal to the area of the six squares faces

$SA=6b^{2}$

where

b is the length side of a cube

In this problem we have

$b=6.5\ in$

substitute

$SA=6(6.5)^{2}$

$SA=253.5\ in^{2}$

7 0

3 years ago

PLEASE HELP!<br> Solve by completing the square<br> x^2+8x = -20

pentagon [3]

Answer: x= -4+/- 2i

Step-by-step explanation: Used the formula (b/2)^2 to create a new term. I solved for x.

FYI

+/- means plus or minus sign I couldn't find the symbol on my key board. Hope this helps!

5 0

3 years ago