2.9% OF the 500 phones are more than likely defective. In order to figure this out you must do 500*0.029 which would equal 14.5 and rounds off to 15. 15 out of the 500 phones will maybe be defective.
This will be the Lowest common multiple of 30 and 40
which is 120 minutes so the time when they will buzz together is 8:00 + 120/60 = 10.00 am
You can use the Pythagorean Theorem since it's indicated in the problem that the triangle is right (has a 90 degree angle in it).
So what you can do is use: a^2 + b^2 = c^2
8^2 + x^2 = 16^2
64 + x^2 = 256
x^2 = 192
x = 8√3
I don't think you can use tangent in this problem since no other interior angles are given.
B) Find the mean and variance of the number that survive
explanation:
Answer:
92.4 m^2
Step-by-step explanation:
Area of Trapezoid: h(b1+b2)/2
6.6 (14.2 + 7.6 + 6.2) / 2
= 6.6 (28) / 2
= 184.8/2
= 92.4 m^2
