Suppose a mobile phone company wants to determine the current percentage of customers aged 50+ who use text messaging on their cell phones. how many customers aged 50+ should the company survey in order to be 90% confident that the estimated (sample) proportion is within three percentage points of the true population proportion of customers aged 50+ who use text messaging on their cell phones.

i use my brain for prombles like this maybe you could try it

step-by-step explanation:

answer: 1475

step-by-step explanation:

becuase you have to know what they are asking you

i think it would be c

mark brainliest if im right

step-by-step explanation:

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629