Rosetta drove her car 160 miles in 2 hours. which of the following correctly expresses her rate as a ratio?

The correct answer is,

The rate of ratio of Rosetta's car = 80 miles per hour

Step-by-step explanation:

Formula:-

Speed = Distance /Time

It is given that,Rosetta drove her car 160 miles in 2 hours.

To find the speed of car

Speed = Distance /Time

Distance = 160 miles

Time = 2 hours

Speed = 160/2 = 80 miles per hour.

Therefore the rate of ratio of Rosetta's car = 80 miles per hour

last option: rhombus or kite

step-by-step explanation:

a kite and rhombus have the same shape. as we don't have any specific formula for the calculation of area of kite. the diagonals are used to calculate the area of a kite or rhombus.

the formula for area of rhombus is given by:

here, d_1 is the first diagonal and d_2 is the second diagonal.

so,

last option is the correct answer ..

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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