2 years ago

Question b with explanation?

1 answer:

8 0

Hello!

The answer is 40. All we have to do is find the number of 16 year olds who spent between 25-35 minutes in social media. That is 145. The number of 13 year olds who spent the same amount of time is only 105, therefore 40 more 16 year olds spent between 25 and 35 minutes on social media.

You might be interested in

A type ii error occurs when: the sample mean differs from the population mean the null hypothesis is incorrectly accepted when i

svetlana [45]

A) the null hypothesis is incorrectly accepted when it is false

3 0

2 years ago

Please factor and find the zeros of each relation (18 marks)

AlekseyPX

Answer:

$C. \ \frac{-2}{3} , \ \frac{-4}{5}\\\\D. \ -2, \ -4$

Step-by-step explanation:

$30x^2 + 44x +16 = 0\\\\2(15x^2 + 22 + 8) = 0\\\\2(15x^2 + 12x + 10x + 8) = 0\\\\2(3x(5x + 4)+2(5x + 4))=0\\\\2((3x + 2)(5x + 4)) = 0\\\\Zeroes : 3x + 2 = 0 => x = \frac{-2}{3}\\$