Dale. Period:
Algebra 1 Section 9 Extra Credit
1) Twenty people apply for an open position at an accountant's office. The distribution of ages of the applicants is
shown in the box plot.
Distribution of Applicant's Ages
23 24
25
26
27
28
29
30
31
32
33
34
35
36
37 38 39
age in years
How many of the applicants have ages that fall within the box of the box plot?
​

An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j