MATHEMATICS MIDDLE SCHOOL

a stadium floor that is in the shape of a circle has a diameter with length of 210 yards. which of these measurements is closest to the area

Answers

Answer 1
Answer: The stadium floor has a diameter of 210 yards, therefore the radius would be 105 yards

The Area of a circle is Pi times radius^2

A = Pi x 105yd^2
A = Pi x 11025yd
A = 34636.06 yd


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MIDDLE SCHOOL

Please help me with these two math problems that I do not quite understand. This is urgent! Write an explicit formula for each explicit formula A(n)=-1+(n-1)(-2)

Describe and correct the error at the right in finding the tenth term of the arithmetic sequence 4,12,20,28.

Answers

Answer:

1)

2)

Step-by-step explanation:

1) To write an Arithmetic Sequence, as an Explicit Term, is to write a general formula to find any term for this sequence following this pattern:

"Write an explicit formula for each explicit formula A(n)=-1+(n-1)(-2)"

This isn't quite clear. So, assuming you meant

Write an explicit formula for each term of this sequence A(n)=-1+(n-1)(-2)

As this A(n)=-1+(n-1)(-2)  is already an Explicit Formula, since it is given the first term the common difference let's find some terms of this Sequence through this Explicit Formula:

2) In this Arithmetic Sequence the common difference is 8, the first term value is 4.

Then, just plug in the first term and the common difference into the explicit formula:

COLLEGE

Two students recently took algebra class tests. the students are at different schools but wanted to compare their performance. the first student scored 80 on the test. her class average was 90 with a standard deviation of 10. the second student scored 70. her class average was 50 with a standard deviation of 10. which student did better?

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On the reasonable assumption that doing better means something like, did better relative to the other students in her school, the second student did better. The first student did somewhat worse than most of the students at her school -- if the scores fit a normal distribution then 85% outscored her. The second student, on the other hand, did better than almost all of the students at her school -- if the scores fit a normal distribution then she did better than 95% of her peers.
COLLEGE

A triangle has 3 sides, 10000, 1000, 10x. Find 10x. What 2 numbers can x be between. answer format: ?<X<?
please help!!!!!!!!!!

Answers

The triangle inequality applies.

a) 10000 < 1000 +10x
.. 1000 < 100 +x
.. 900 < x

b) 1000 < 10000 +10x
.. 100 < 1000 +x
.. -900 < x

c) 10x < 10000 +1000
.. x < 1100

x can be between 900 and 1100
HIGH SCHOOL

which of th following are characteristics of the reciprocal parent functiona. it has a horizontal asymptote at y=0b. it passes through the point (1,0)c. it has a vertical asymptote x=0d. it passes through the point (2,0.5)

Answers

All of the optiona are characteristics of the reciprocal parent function except option b. (i.e. the reciprocal parent function do not pass through the point (1, 0)
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