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MrRa [10]
3 years ago
6

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. A circle has a diameter

of 28 centimeters. Estimate the area of the circle. Use 22 7 for π .
Mathematics
1 answer:
Over [174]3 years ago
7 0

Answer:

The area of the circle is 616\ cm^{2}

Step-by-step explanation:

we know that

The area of the circle is equal to

A=\pi r^{2}

In this problem we have

r=D/2=28/2=14\ cm ----> the radius is half the diameter

substitute

A=(22/7)(14)^{2}=616\ cm^{2}

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A private detective figures that he has a one in ten chance of recovering stolen property for his client...
slamgirl [31]

Answer:

C) The expected value is -$2000, so the detective should not take the job.

Step-by-step explanation:

The expected value is the sum of products of income and probability:

E = -10,000·1.00 + 80,000·0.10 = -10,000 +8,000 = -2,000

The detective can be expected to lose money on the job, so should not take it.

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4 years ago
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6 0
4 years ago
Simplify completely 12 times x to the third power minus 4 times x to the 2nd power plus 8 times x all over negative 2 times x
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5 0
3 years ago
for a trip, one high school rented and filled 2 vans and 8 buses with 176 students.another high school instead fit its 164 stude
vodka [1.7K]

Answer:

A bus carries 20 students while the van carries 8 students

Step-by-step explanation:

Let's assume that the number of students that the bus can carry is X And

The number of students that the van can very be y

From first statement,

8x + 2y = 176______ first equation

From Second statement,

7x + 3y = 164______ second equation

The above is a simultaneous equation and we will use the elimination method to solve for both x and y

But if we take a look at both equations,we will find out that we can't make use of the elimination method since the coefficients of both x and y aren't same in both equations.

What we have to do now is to multiply equation 1 by 3 and multiply equation 2 by 2 so as to get the coefficients of y in both equation to be the same.

Initially, both equation are

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7x + 3y = 164____ second equation

They will now be :

24x + 6y = 528(was multiplied by 3)

14x + 6y = 328(was multiplied by 2)

Now subtract equation 2 from 1 and we have

10x = 200

X = 20

Now substitute x = 20 in equation 1 above

8x + 2y = 176

(8 × 20) + 2y = 176

2y = 176 - 160

Y = 8

Remember that we assumed that the number of students that each bus carried was x and van was y,now we know the values of c and y to be 20 and 8 respectively.

Therefore, each bus carried 20 students and each van had 8 students on it

8 0
4 years ago
Read 2 more answers
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