2 flowers coast 7 dollars and 3 flowers cost 10 dollars and 4 flowers cost 14 dollars and 5 flowers cost 17 dollars

3.5

Step-by-step explanation: divide 7cost÷2flowers

14

Step-by-step explanation:

To do this equation you need to multiply the amount of flowers by the number they cost. But they reduce the price down for more flowers you buy.

Answer-

In 25.15% cases their response times is over 30 minutes.

Solution-

Hint- Calculating the z-score (how much standard deviations away from the mean) and then getting the corresponding probability value from normal distribution table we can get solution.

Applying the formula for Z-score,

Here,

X = score = 30,

μ = mean = 22,

σ = standard deviation = 11.9

Putting the values,

(Subtracted from 1 as the values of area to the left of the Z score is given in table, but we need the area right to Z score as response times more than 30 minutes is asked)