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larisa86 [58]
3 years ago
7

Find the surface area of a sphere with a diameter of 14 cm. Leave your answer in terms of pi.

Mathematics
1 answer:
tangare [24]3 years ago
3 0

Answer:

196 pi

Step-by-step explanation:

Equation for Surface Area = 4 pi r^2

r = 14/2 = 7

4(7^2)pi

(4)(49)pi

196pi

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Use the quadratic formula to solve the equation x^2-7x-6=0
olganol [36]

Answer:

\frac{7\pm\sqrt{73}} {2}

Explanation:

We have been given with the quadratic equation x^2-7x-6=0

We have general formula to find the roots of a quadratic equation first we find the discriminant with formula

D=b^{2}-4ac

and after that to find the variable suppose x we have the formula

x=\frac{-b\pm\sqrt{D}} {2a}

And general quadratic equation is

ax^2+bx+c=0

On comparing the given quadratic equation with genral quadratic equation we will have values

a=1, b=-7 and c=-6

After substituting these values in the formula we will get  

D=(-7)^2-4(1)(-6)={73}

After substituting in the formula to find x we will get

\frac{-(-7)\pm\sqrt{73}} {2}= \frac{7\pm\sqrt{73}} {2}

4 0
4 years ago
Read 2 more answers
a private school admits no more than 100 students every year. additionally, at least 30 of these students must be girls, and the
Thepotemich [5.8K]
2/2 part of the equation is ≤ B
maybe       30/100 ≤ B
7 0
3 years ago
What is the answer to 8(t+2)-3(t-4)=6(t-7)+8
Natasha_Volkova [10]

If you're just looking for the simplified equation that would be : 5t + 28 = 6t - 34

But if you're looking to find the value of "t" that would be : t = 62

If then, you are looking for the answer to the equation with t inserted, the equations are equal both sides equal : 338

I hope that answered your question. If not, lmk.

6 0
3 years ago
Help asap Which explains how to find the quotient of the division below? -3 1/3 divided by 4/9
noname [10]

Answer:

-7\frac{1}{2}

Step-by-step explanation:

To find the quotient, convert the mixed number to an improper fraction first

-3\frac{1}{3}=-\frac{3*3+1}{3}=-\frac{10}{3}

Find the quotient now

\frac{(-10/3)}{(4/9)}=-\frac{10*9}{4*3}\\ \\=-\frac{90}{12}

Simplify

Divide by 6 both numerator and denominator

=-\frac{15}{2}=-7.5

Convert to a mixed number

-7.5=-(7+0.5)=-(7+\frac{1}{2})=-7 \frac{1}{2}

4 0
3 years ago
Read 2 more answers
Craig has a rectangle wooden deck that measures 799 inches by 245 inches that he wants to put a string of lights around. What le
tino4ka555 [31]

Answer:

He should buy lights that are 2088 inches long

Step-by-step explanation:

Craig has a rectangle wooden deck that measures 799 inches by 245 inches.

Let us say the length, L, is 799 inches and the breadth, B, is 245 inches.

He wants to put a string of lights around the deck.

This means that he needs to buy the length of lights that would be equal to the perimeter of the rectangular deck.

The perimeter of a rectangle is given as:

P = 2(L + B)

Hence, the length of lights he should buy is:

P = 2(799 + 245) = 2(1044)

P = 2088 inches

He should buy lights that are 2088 inches long.

5 0
3 years ago
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