Math 150+ Review 1

If sinx is negative, secx must also be negative.  

If sinx<0 and cotx<0, find the quadrant of angle x.

On a standardized exam, the mean is 88 and the standard deviation is 2. 

Which angle is co-terminal to 45 degrees?

Find the sample standard deviation to the nearest hundredth.  55, 45, 56, 11, 12

If the _____________ for a data set is 100, than at least one score MUST be 100.

Given a normal dist. with mean is 72 & standard dev. of 8.3, which score occurs most often? 

The graph of y = 3cos 2x has a period of π

Given point p(.1, .9) on the unit circle, which of the following represent the value of sinx?

For scores: 88, 87, 89, 92, 98, 76.  Find the population standard deviation (n. hundredth).

If the probability of an event occurring is 3/5, which of the following represent the odds?

Find the linear regression equation and use it to predict the money made after 7 lawns.  

How many ways can the first 2 places in a race come out if 11 people enter?

On a test, the mean is 86 &  standard deviation is 7.3, find the score at the 30.9th percentile

The roots of the following equation y = x² + 4x + 10 are:

Ball is pulled from 5 orange, 2 white& 4 green.  Find P(green, given it is not orange).

The roots of the following equation y = x² + 5x - 9 are:

You may use the bathroom during class on Final Exam Test Day.  

A permutation is used to count objects when repetition is not allowed and order doesn't matter.

In a normal distribution, what percent of the values lie within 2 standard deviations?

The roots of the following equation y = x² - 4x - 45 are:

The graph of y = -5cos3x has a frequency of 3.  

The expression i²⁰ is equivalent to 0.  

Find the product of  (7 + 3i) and (2 - i)

The angle -100^o lies in quadrant III.  

Given a normal dist. with mean is 72 & standard dev. of 8.3, which score occurs least often? 

Which represents the conjugate of 3 + 5i?

Find the value of the expression i⁸⁸:

What are the period and amplitude for this graph?

For the equation y= - 5sin3x, the amplitude is -5.

The roots of the following equation y = 9x² + 12x + 4 are:

Given a normal distribution, find the % of values that fall within 1 standard deviation.

Convert 120 degrees to radians (leave your answer in terms of pi).

How many 3 person committees can be made from a class of 13?

If cosx<0 and sinx < 0, then angle x must be in which quadrant?

The angle -240^o lies in Quadrant II.

Which could be an approximate correlation coefficient?