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3 years ago

What are the answers to these questions?

Mathematics

1 answer:

allochka39001 [22]3 years ago

7 0

Answerplz someone answer i need help on this

Step-by-step explanation:

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Brainliest!!! 10 POINTS

Nikolay [14]

Answer:

it's true

Step-by-step explanation:

diameter pass through center and touch the circumference

3 0

4 years ago

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The volume of Cube A is 8 cubic inches. The face of Cube B has an area of 64 square inches. Which cube has a greater side lengt

defon

The cube which has a greater side length according to the task content is; Cube B.

<h3>Which cube has a greater side length?</h3>

It follows from the task content that since cube A has a volume of 8 in³, it follows that its side length is;

s(A) = ³√8 = 2in.

Also, since one face of cube B has an area of 64 in², it follows that the side length is;

s = ²√64

s(B) = 8 in.

Hence, Cube B has the greater side length.

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2 years ago

Suppose the average commute time of your employees is unknown. The standard deviation of their commute time is estimated as 24.5

Leona [35]

The number of employees is 91.

According to the statement

Given that the standard deviation = 24.5

The width in the question = 13

We solve for the margin of error E.

E = width / 2

E= 13/2 = 6.5

At 90%

Alpha = 1-0.90

= 0.1

Alpha/2 = 0.1/2 = 0.05

Z 0.05 = 1.576

Now find the Sample size n

= ((1.576x24.5)/2)²

= 90.8

= 91

So, The number of employees is 91.

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3 0

2 years ago

A brand of cereal had 1.2 milligrams of iron per serving. Then they changed their recipe so they had 1.8 mg of iron per serving.

Anvisha [2.4K]

Using it's concept, it is found that the percent increase in the amount of iron per serving was of 50%.

<h3>What is the percentage increase of a value?</h3>

It is given by the increase divided by the initial value, and subtracted by 100%.

In this problem:

The initial value is of 1.2 mg.

The increase was of 1.8 mg - 1.2 mg = 0.6 mg.

Hence the percent increase is given by:

P = 0.6/1.2 x 100% = 50%.

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8 0

2 years ago

Determine which equation is parallel to the line JK and which is perpendicular to like JK

sattari [20]

Answer:

If the equation of JK is y = mx + c, then y = mx + c' is the equation of the straight line parallel to above and $y = - \frac{1}{m}x + b$ will be perpendicular to that.

Step-by-step explanation:

Let us assume that the line JK has the equation in slope-intercept form as

y = mx + c ............. (1)

Therefore, the equation has slope = m

Now, any straight line having an equation with slope m will be parallel to line JK.

So, the equation of the straight line which is parallel to equation (1) will be

y = mx + c', where, c' is any real constant.

Now, let us assume that another straight line having equation

y = nx + a is perpendicular to the line JK i.e. equation (1).

Now, we know if two lines are perpendicular to each other then the product of their slopes will be - 1.

So, mn = - 1

⇒ $n = - \frac{1}{m}$

Therefore, the equation of a straight line which is perpendicular to equation (1) will be $y = - \frac{1}{m}x + b$ where b is any real constant. (Answer)

3 0

4 years ago

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