3 years ago

Help please i’m confused

Mathematics

1 answer:

morpeh [17]3 years ago

7 0

Answer:

7/10 pi (radians)

Step-by-step explanation:

The formula for sector area is (angle * r^2)/2

140pi = angle*r^2/2

multiply both sides by 2

280pi = angle * r^2

r = 20 cm (substitute)

280pi = angle * (20)^2

280pi = angle * 400

Divide both sides by 400

7/10 pi = angle

You might be interested in

This graph shows a proportional relationship.

Lena [83]

Answer:

7.6

Step-by-step explanation: i dont know for sure

7 0

3 years ago

Read 2 more answers

Whats an eqaution to this? please helppp

Triss [41]

Y=-1/4+4

-1/4 is the slope and the 4 is the y-intercept (where the line touches the y-axis)

I hoped this help's!!!

4 0

3 years ago

Read 2 more answers

7.5 liters of a certain solution contain 37 grams of salt. What is the density of salt in the solution? Round your answer, if ne

vazorg [7]

Answer:

The density of salt solution is $4.94\times 10^{-3}\ g/cm^3$ .

Step-by-step explanation:

Given that,

Volume of certain solution, V = 7.5 litres

Mass of salt in solution, m = 37 grams

We know that, $1\ L=1000\ cm^3$

We need to find the density of salt in the solution. The density of salt is given by mass per unit volume. The formula can be written as:

$d=\dfrac{m}{V}\\\\d=\dfrac{37\ g}{7.5\times 10^3\ cm^3}\\\\d=4.94\times 10^{-3}\ g/cm^3$

So, the density of salt solution is $4.94\times 10^{-3}\ g/cm^3$ .

4 0

3 years ago

Read 2 more answers

Round each number to the nearest 100 <br> 976

dedylja [7]

Answer:

976 rounds to 1000

Step-by-step explanation: pls brainliest!

8 0

3 years ago

Given the equation, y= 1/3 x - 4. what is the slope and the y-intercept?

tamaranim1 [39]

Answer:

The slope (m) = 1/3 and the y-intercept (b) = -4

3 0

4 years ago