7.5 x 10^-4 in standard form and scientific notation please 10 points

75,000

Step-by-step explanation:

scientific notation = 75,000

   ✧                    ✶                   ✡✴︎                        ✳︎                 ❄︎  

Hello! I will help you with joy! The answer is 75,000!    ✺             ✮             ✶

Step-by-step explanation:             ✩         ✱             ✴︎         ❁      

You must move the decimal point 4 times to the left because the exponent is negative.

Hope it Helps You! Please Mark Brainliest !

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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i think the answer is b