The cumulative frequency graph shows information about the times, in minutes, taken by 40 men to complete a fitness exercise.
Cumulative
a) How many men took more than frequency
80 mins to complete the exercise?
(1)
40
b) Use the graph to find an estimate
for the median time taken.
(1)
c) Use the graph to find an estimate
for the interquartile range.
(2)
30
20
10
One of the 40 men is chosen at random.
d) Use the graph to find an estimate
for the probability that this person
took between 60 mins and 80 mins
to complete the exercise.
0
(2)
20
40 60
Time (mins)
80 100
Total marks: 6

At river bank, checking account customers earn 0.75% interest a month on their account balances, pay no service fees for writing checks, and pay a monthly $2.00 financial charge. calculate the income earned in one month on the checking account for a customer with an account balance of $1,000. a. $4.25 b. $5.50 c. $6.75 d. $7.25 checking account earnings at baker’s bank are expressed by the equation: i = -0.09x + 10.2. while the earnings at elite bank are modeled by: i = -0.02x + 7.5. in both cases, x is the number of checks written. at what number of checks will elite bank start generating more checking account income than baker's bank? a. 12 b. 25 c. 39 d. 42 emilio’s checking account had a balance of 728.32 at the beginning of the week. he wrote checks for the following amounts throughout the week: $99.48, $33.50, $18.23, and $72.05. he also deposited his paycheck in the amount of $1,109.90. what is his account balance at the end of the week? a. $1,192.35 b. $1,222.86 c. $1,540.52 d. $1,614.96