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3 years ago

Please help quick please

Mathematics

2 answers:

Naya [18.7K]3 years ago

3 0

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Answer: 9.27

Explanation:

I hope this helped!

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- Zack Slocum

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const2013 [10]3 years ago

3 0

Answer:

9.27

You can find the answer by using the formula

r = √(V / (π * h)) ,

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megan hughes deposits 2100 in an account that pays simple interest. when she withdraws her money 11 months later, she receives $

USPshnik [31]

Answer:

The rate at which the account pay the deposit is 2 %

Step-by-step explanation:

Given as :

The principal amount deposited in account = $2100

The rate of interest = r % simple interest annually

The time period = 11 months = $\frac{11}{12}$ year

The amount received = $2138.50

Now<u>, From Simple Interest method </u>

Simple Interest = $\dfrac{\textrm Principal\times \textrm rate\times \textrm time}{100}$

Or, Interest = $\dfrac{2100\times r\times \frac{11}{12}}{100}$

Or, Interest = $\frac{21\times r\times 11}{12}$

Or, Interest = 19.25 r

Now, Interest = Amount - Principal

So, 19.25 r = $2138.50 - $2100

Or, 19.25 r = $38.5

∴ r = $\frac{38.5}{19.25}$

I.e r = 2

So, rate of interest = r = 2 %

Hence The rate at which the account pay the deposit is 2 % Answer

8 0

3 years ago

A university has 31,560 students. In a random sample of 180 students, 12 speak three or more languages. Predict the number of st

kodGreya [7K]

<h3>Hello there!</h3>

Here's the information given to us written out:

- 31560 total students

- 12/180 students speak 3 or more

To solve:

To solve this, use the probability from the survey of 180 students to make a reasonable estimate for the 31560 total students.

12/180 students were able to speak 3 or more languages. This proportion, of 12 students : 180 students can be adjusted.

Just like when simplifying fractions, both sides can have an operation (of multiplication or division) done to it and still be equivalent.

In this case, we want to set the side of total students to be equivalent to 31560 to get the estimated number of students that speak 3 or more languages.

To get the number to multiply both sides by:

31560 / 180 = 175 1/3 = 526/3

Now, carry out the operation - multiply both sides by that number.

12/180 = (12 * 526/3) / (180 * 526/3) = 2104 / 31560

So, out of 31560, using the same probability, around 2104 students would speak 3 or more languages.

Hope this helped!

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4 years ago

To find the distance an object has traveled, you use the formula D=RT; where D=distance, R=rate and T=time.

devlian [24]

Answer:

52.25 MPH

Step-by-step explanation:

Using the formula given D=RT we simply plug in values,

313.5=6R

313.5/6=R

52.25=R

6 0

3 years ago

Given that the quadratic equation 3x^2+bx-2 has x-intercept {-2, 4}. What is the "b" value.

Luba_88 [7]

The value of b is $b=3$

Explanation:

The given quadratic equation is $y=3x^{2} +bx-2$

And has x - intercept $(-2,4)$

To determine the value of b, let us substitute the coordinates $(-2,4)$ in the given quadratic equation $y=3x^{2} +bx-2$

Substituting the x - intercept in the equation $y=3x^{2} +bx-2$ , we have,

$4=3(-2)^{2} +b(-2)-2$

Simplifying, we have,

$4=3(4)-2b-2$

$4=12-2b-2$

Adding the constant terms, we get,

$4=10-2b$

Subtracting both sides by 10, we have,

$-6=-2b$

Dividing both sides by -2, we get,

$b=3$

Hence, the value of b is $b=3$

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3 years ago

Reflect the point (2,-4) over the y-axis

kkurt [141]

Answer: (-2, -4)

Step-by-step explanation:

When a point is reflected over the y-axis, multiply the x-coordinate by -1.

7 0

3 years ago

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