when multiplying two variables that are raised to different powers you multiply the coefficient 7x3=21, then add the powers, 9+4=13 and you get 21k^13

4 0

3 years ago

Read 2 more answers

100 pts for an answer. one day jasmine earned $25.20 for 6 hours of work. Another day jasmine earned 16.80 for 4 hours of work.

alexira [117]

Answer:

Step-by-step explanation:

<u>Use the given points to find the hourly pay:</u>

$25.20/6 = $4.20
$16.80/4 = $4.20

<u>Correct function to show the payment for h hours is:</u>

c = 4.20h

5 0

3 years ago

determine the sample sieze erequired to estimate teh mean score on a standardizes test within 4 [pints of the trrue mean with 98

Andreas93 [3]

Answer: Minimum sample size = 110

Step-by-step explanation:

Formula to find minimum sample size :

$n=(\dfrac{z\times s}{E})^2$ , where z = critical z-value for confidence level, s= sample standard deviation , E = margin of error

Given: E= 4 , s= 18

Critical z-value for 98% confidence = 2.327

So, $n=(\dfrac{2.327\times18}{4})^2$

$=(\dfrac{41.886}{4})^2\\\\=(10.4715)^2=109.65231225\approx110$

Minimum sample size = 110

5 0

3 years ago