What percentage of z-scores in the standard normal distribution are less than z = .20?

A) 42.07%
B) 57.93%
C) 84.00%
D) 92.07%

________ is a measure of a linear relationship between two variables.

A) Variance
B) Proportion
C) Correlation
D) Kurtosis

Simplify the expression. Assume that all variables represent positive integers. ${\left(x^{y+5}\right)}^{y-5}$

A) $x^{y^2-s^2}$
B) $x^{y^2+2y5+5^2}$
C) $x^{y^2+s^2}$
D) $x^{y^2-2y5-5^2}$
E) $x^{y^2+2y5-5^2}$

What percent of $6.39 is $16.39?

A caterer charges $939 to cater a wedding plus $8 per person served a meal. Write a linear model that relates the cost C (in dollars) to cater a wedding to x the number of people served a meal.

A) $C=947x$
B) $C=8+939x$
C) $C=8-939x$
D) $C=939+8x$
E) $C=7,512x$