Several science students used the same design when constructing a bridge out of balsa wood. they each tested the bridge's weight capacity using cups filted with sand. the weight capacities were recorded, and the results follow a normal distribution curve. the mean of the weighs is 19.6 lb with a standard deviato n of 1.3 lb. which weight is greater than 70% of the data?

We are given:

We have to find the weight which is greater than 70% of the data.

The z value which corresponds to 70% of the area on the standard normal table is:

Now, the weight  which is greater than 70% of the data is:

rounded to two decimal places

Therefore, the weight which is greater than 70% of the data is 20.28 lb

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

answer: the answer is 110