Answer:
56 cm²
Step-by-step explanation:
The area (A) of a trapezoid is calculated as
A = h(a + b)
where h is the perpendicular height and a, b the parallel bases
here h = 4, a = 5 + 9 + 5 = 19 and b = 9, thus
A = × 4 × (19 + 9) = 2 × 28 = 56 cm²
We have been given that the test scores on a final exam are normally distributed with a mean of 74 and a standard deviation of 3. We are asked to find the probability that a randomly selected test has a score higher than 77.
First of all, we will find z-score corresponding to sample score 77.
, where,
z = z-score,
x = Random sample score,
= Mean,
= Standard deviation.
Now we need to find .
We will use formula to find the probability greater than a z-score of 1.
Using normal distribution table, we will get:
Therefore, the probability that a randomly selected test has a score higher than 77 would be 0.15866.
Length L is a function of the number of days: the more days the crew works the more mileage they will achieve:
L=f(D) =4D+200
So the DOMAIN is D & the RANGE is L
ln isosceles triangle both sides are equal and the total of all the angles in a triangle is 180 degree so the third angle will be
[180-(79+79)] degrees
=22degrees
Kilograms because the other weight measurements are too small and obscure to measure smithing as big as a horse. :)