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Mathematics Quiz

Authored by William MacIntosh

Computers

12th Grade

Used 1+ times

Mathematics Quiz
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17 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A recursive formula for the sequence 81, 54, 36, ... is

a_n = 81(0.67)^(n-1)

a_1 = 81 a_n = a_{n-1} - 27

a_n = 81 + (n-1)(-27)

a_1 = 81 a_n = 0.67a_{n-1}

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Given q(θ) = 2 cos(1/3 θ) on the interval -π < θ < π, the function q

increases, then decreases

decreases, then increases

increases throughout the interval

decreases throughout the interval

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a group of 50 trains, 30 have electric engines, 25 have diesel engines, and 10 have both diesel and electric engines. How many trains have neither electric nor diesel engines?

5

15

25

35

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The weights of the 2500 students at Riverside High School are approximately normally distributed with a mean of 150 pounds and a standard deviation of 15 pounds. The number of students at Riverside who weigh between 135 and 165 pounds is closest to

1700

1800

1900

2000

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A researcher wants to find out if listening to classical music helps people concentrate better. Which method of data collection is most appropriate?

census

survey

observation study

controlled experiment

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A sequence is defined as b_n = b_{n-1} + log_{n+2}(n), where b_1 = 5. What is the value of b_3?

5

5.3

6.1

7

7.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Given P(C) = 3/4 and P(D) = 2/5, where C and D are independent events, determine P(C ∩ D).

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