Assume the amount of time statistics students spent studying for the Math 10 final exam is exponentially distributed with a mean of 4.2 hours. Eighty percent (80 %) of students studied more than how many hours? a. 0.9
b. 3.4
c. 6.8
d. 7.6

41*67/2=1373.5

step-by-step explanation:

i just used a calculator

27 +27 or 27times 2=54

the diffrence is 0

she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

contact me if you have any questions you are welcome.

step-by-step explanation:

gym b charges $1.05 less per hour than gym a.