Sally finds that the experimental probability of her putting a ball into a hole is 15%. out of 20 putts, about how many could she predict she would make?

Given the experimental probability of  putting a ball into a hole is 15%.

Experimental Probability is  probability based on an experiment written as a ratio comparing the number of times the event occurred to the number of trial .It can also be written as a percentage.

Experimental probability is given as 15%  that is out of 100 trials the number of times the ball was put in the hole is 15.

The question is asking us to find the number of times the ball will be put in the hole if number of butts is 20.

Number of times the ball will be put in the hole for 20 trials = 15% of 20= 0.15 x 20= 3 .

She can predict to put the ball 3 times in the hole if number of trials is 20.

region b will make the inequalities y < 2x + 1 and y > -x - 2 true ⇒ answer a

step-by-step explanation:

* lets study the graph and the inequality to solve the question

- the inequality y > -x - 2

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = -2 that means the line intersect the y-axis at point (0 , -2)

∵ the sign of the inequality is >

∴ we shad the part over the line

  region a and b

- the inequality y < 2x + 1

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = 1 that means the line intersect the y-axis at point (0 , 1)

∵ the sign of the inequality is <

∴ we shad the part under the line

  region b and c

∵ the common region between the two lines is region b

∴ region b will make the inequalities y < 2x + 1 and y > -x - 2 true