The amount of time devoted to studying statistics each week by students who achieve a grade of A in the course is normally distributed with a mean of 7.5 hours and a standard

deviation of 2.1 hours.

a. What proportion of A students study for more than 10 hours per week.

b. Find the probability that an A student spends between 7 and 9 hour

idn

step-by-step explanation:

$3720

step-by-step explanation:

taxable income = $31000

as per the 2018-2019 us tax bracket, the tax rate is 12% for an individual whose taxable income is between $9,526 to $38,700.

so, the tax to be paid by him = 12% of 31000

= 0.12 * 31000     [12% converted to decimal as 0.12]

= $3720

if e is the midpoint of bd, then bd is 14.

step-by-step explanation: