PLEASE HELPPPPPP!!!!Tim sells two types of pizza. He charges $10 for a cheese pizza and $15 for a pepperoni pizza. Yesterday he
2 answers:
<u>Answer:</u>
- He made $880 yesterday.
<u>Step-by-step explanation:</u>
<u>1 cheese pizza = 3 pepperoni pizzas</u>
- => (x) cheese pizza = 3(x) pepperoni pizzas
- => x + 3x = 64
- => 4x = 64
- => x = 16
<u>Hence, Tim sold 16 cheese pizzas and 48 pepperoni pizzas.</u>
- => 1 cheese pizza = $10
- => 1 pepperoni pizza = $15
- => (10 x 16) + (48 x 15) = Total money earned
- => $880 = Total money earned
Hence, <u>he made $880 yesterday. </u>
Hoped this helped.
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<h2>Answer with explanation:</h2>
Confidence interval for mean, when population standard deviation is unknown:
, where = sample mean
n= sample size
s= sample standard deviation
= Critical t-value for n-1 degrees of freedom
We assume the population has a normal distribution.
Given, n= 19 , s= 3.8 ,
A) Critical t value for and degree of 18 freedom
= 2.8784
B) Required confidence interval:
Lower bound = 19.9 years
Uppen bound = 24.9 years
C) Interpretation: We are 99% confident that the true population mean of lies in (19.9, 24.9) .