3 4a - 2 = 3r + d. for a 2 + 3r +d
A) a=
4
4
B) a=
2 + 3r + d
2 + 3r-d
C) a =
4
D) a = -8 - 12r + 4d

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

2nd one in the first row is correct

you probably already have the answer but anyways it's b. 15.0

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.

click to let others know, how is it

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