Ask question

Ask question

All categories

2 years ago

9

The inner core of Earth begins about 3200 miles below the surface of Earth and has a volume of about 581,000,000 pi cubic miles.

Approximate the radius of Earth. Round your answer to the nearest whole number.

1 answer:

weqwewe [10]2 years ago

7 0

$r=3958. 13$ miles good luck in college a student from middle school

You might be interested in

Find the side of to cube<br> whose volume is<br> 5.832cm3

Scorpion4ik [409]

Answer:

$1.8cm$

Step-by-step explanation:

Use the volume of cube formula.

$\displaystyle V=s^3$

$\displaystyle5.832=s^3$

$\displaystyle\sqrt[3]{5.832} =s$

$\displaystyle s=1.8$

3 0

2 years ago

Read 2 more answers

The value of a jewel in 2015 was $17500. The jewel was purchased in 2008, and its value appreciated 2.5%

ArbitrLikvidat [17]

Answer:

$14722.14

Step-by-step explanation:

We are given that

In 2015

The value of jewel=$17500

Rate of appreciation, r=2.5%

We have to find the initial value of the jewel when it was first bought.

Time, n=7 years

Final value= $Initial\;value (r/100+1)^n$

Using the formula

$17500=Initial\;value(2.5/100+1)^7$

$17500=Initial\;value(1.025)^7$

$Initial\;value=\frac{17500}{(1.025)^7}$

Initial value=$14722.14

Hence, the the initial value of the jewel when it was first bought=$14722.14

5 0

2 years ago

A grocer wants to mix two kinds of coffee. One kind sells for $1.55 per pound, and the other sells for $2.80 per pound. He wants

anastassius [24]

9.5 or 9 1/2 if you want them both to be an equal mix

7 0

2 years ago

Simplify this expression 3xy + 10xy - 5x + 2x - 2yx? Re-write the equations so that like terms are together. (Remember that orde

Elenna [48]

First you have to find the like terms
3xy + 10xy - 2xy and -5x + 2x
After that you solve for the like terms to find the final answer
11xy-3x

6 0

2 years ago

Need help asap. Will mark brainliest.

ZanzabumX [31]

Answer:

$X=\begin{bmatrix}17 &3 \\-24 &-12 \\3 &-16 \end{bmatrix}$

Step-by-step explanation:

Matrix Equations

Given:

$A=\begin{bmatrix}-7 &-2 \\9 &7 \\2 &4 \end{bmatrix}$

$B=\begin{bmatrix}-4 &-3 \\3 &9 \\9 &-4 \end{bmatrix}$

Find X such that:

B - X = 3A

Subtracting B:

- X = 3A - B

Multiplying by -1:

X = -3A + B

Find -3A:

$-3A=-3\begin{bmatrix}-7 &-2 \\9 &7 \\2 &4 \end{bmatrix}=\begin{bmatrix}21 &6 \\-27 &-21 \\-6 &-12 \end{bmatrix}$

Add to B:

$X=-3A+B=\begin{bmatrix}21 &6 \\-27 &-21 \\-6 &-12 \end{bmatrix}+\begin{bmatrix}-4 &-3 \\3 &9 \\9 &-4 \end{bmatrix}=\begin{bmatrix}17 &3 \\-24 &-12 \\3 &-16 \end{bmatrix}$

Thus:

$X=\begin{bmatrix}17 &3 \\-24 &-12 \\3 &-16 \end{bmatrix}$

3 0

2 years ago