Andrea and Ashley are middle-distance runners for their school's track team. Andrea's times in the 400-meter race are approximately normally distributed with a mean of 62 seconds and a standard deviation of 0.8 seconds. Ashley's times are approximately normally distributed with a mean of 62.8 seconds and a standard deviation of 1 second. a) The school record for the 400-meter is 60.0 seconds. What is the probability that Andrea breaks the record in her next race?b) Assuming that Andrea and Ashley's time in any race are independent, what is the probability that Ashley beats Andrea in their next race?

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

b because it contains 40% of the possible results from the random list.  

0,1,2,3 v 4,5,6,7,8,9  

4 integers to 6 integers  

40% success vs 60% fail

step-by-step explanation:

she made 48 + y = a cookies.     not enough info is given to find the total.