An electric motor manufacturer has stocked 200,000 new motors in the warehouse. In a statistical study a random sample of 250 motors have been tested. The study showed that the motors will on average operate within the specified parameters for 3,500 hours with a standard deviation of 430 hours. It is also assumed that the data is normally distributed. a) Find the approximate number of motors that might work 4,000 hours or more

your answer would be b

step-by-step explanation:

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24

hello, there is a new name in town and that's the human spider!

answer: d.) the total number of protons and neutrons is 15

merry christmas!

~

your friendly neighborhood human spider! .

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm