The amount of interest on $x for 2 years is$320. the amount of discount on $x for one year is $148. find the annual effective interest rate i and the value of x.

The answer is ""

Step-by-step explanation:

2-year interest is:

The price of the discount is :

by mixing (ii) in (i), we get:    

The Interest rate of annual impact:  

i=0.05311  

x=$ 2934.4670

529 and 531

step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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