Suppose 30% of the people in your town talk on their cell phones and drive at the same time. If you stood on a busy street corner and watched 50 people drive by, what is the standard deviation of the model you would use for the sample proportion you observe?

Step-by-step explanation:

Given

Required

Determine the standard deviation

Standard Deviation (SD) is calculated as:

Substitute values for n and p

Convert percentage to decimals

approximated

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1

the answer will be b x² +x-1

step-by-step explanation: