12. javier thinks most of the cars and trucks on the road are blue. to prove his hypothesis, he sat beside a road for one hour and
recorded the color and type of vehicle that passed by him. he is preparing the two-way table shown. how many of the vehicles that
passed by him are blue cars?
10
bluenot blue total
pickup truck4
car
total 12 38 50
a. 8
b. 32
c. 12
d. 40

12m

step-by-step explanation:

square root means have of a number so have of 3 is 1.5 then multiply it by 8 and you get your answer!

only 10/60 isn't equivalent

hope this : )

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

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.

click to let others know, how is it

0.0

0 votes

1

report

read more on -

step-by-step explanation: