A scientist took a sample of spiny lumps (a type of fish) and found this sample to have a mean length of 2.5 cm. It is estimated that 16% of spiny lumps have a length of 4 cm or greater. What is the standard deviation of the lengths of this sample of spiny lumps?

1

2.25

1.5

0.5

0.75

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17

faster, im not sure why but i know it is faster

the answer would be a 24

step-by-step explanation:

c=2πr=2·π·3=24