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maria [59]
2 years ago
13

The boys and girls soccer clubs are fundraising for new uniforms. The boys soccer club is selling candy bars for $2 a piece. The

girls soccer club is selling candles for $4. They must raise more than $800. The girls expect to sell at least 100 candles. Write a system of inequalities to represent the situation
Inequality 1:
Inequality 2:
Mathematics
1 answer:
blondinia [14]2 years ago
6 0

Answer:

2b + 4c = 800

c > 100

Step-by-step explanation:

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Assume that the radius r of a sphere is expanding at a rate of 40 cm/min. The volume of a sphere is V = 4 3 πr3 and its surface
Scrat [10]

Answer:

The rate of change in surface area when r = 20 cm is 20,106.19 cm²/min.

Step-by-step explanation:

The area of a sphere is given by the following formula:

A = 4\pi r^{2}

In which A is the area, measured in cm², and r is the radius, measured in cm.

Assume that the radius r of a sphere is expanding at a rate of 40 cm/min.

This means that \frac{dr}{dt} = 40

Determine the rate of change in surface area when r = 20 cm.

This is \frac{dA}{dt} when r = 20. So

A = 4\pi r^{2}

Applying implicit differentiation.

We have two variables, A and r, so:

\frac{dA}{dt} = 8r\pi \frac{dr}{dt}

\frac{dA}{dt} = 8*20\pi*40

\frac{dA}{dt} = 20106.19

The rate of change in surface area when r = 20 cm is 20,106.19 cm²/min.

6 0
3 years ago
Pls help me this i due today
finlep [7]

Step-by-step explanation:

due to the rules of crossing lines and their angles, the 2 angles opposite of each other must be equal.

so,

7x + 7 = 112

7x = 105

x = 15

8 0
2 years ago
Question 2. Taylor is fertilizing her yard. She
sweet [91]
Answer is “D” I took the test my self
3 0
2 years ago
6 hundred thousands + 38 hundreds
Mekhanik [1.2K]
600,000 + 3,800 = 603,800
3 0
3 years ago
A store pays $45 for a radio. The store marks the radio up 30%. What is the selling price for the radio?
rodikova [14]
45 times .3 =13.5                            okkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
7 0
2 years ago
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