Maple grove wants to include two types of maple trees, the namesake of the city, for their parks. two varieties of maple trees have been selected. one variety costs $75 per tree; the other more colorful variety costs $90 per tree. the tree budget must not exceed $70,000. citizens want more of the colorful $90 trees than the others if possible.

or

Step-by-step explanation:

Given information is :

Two varieties of maple trees have been selected.

Let the first variety of trees be = x

Let the second colorful variety of trees be = y

One variety costs $75 per tree;

The other more colorful variety costs $90 per tree;

Given is - The tree budget must not exceed $70,000. This means the total cost of the trees should be less than or equal to 70000.

Thus, the equation forms:

Also given is - Citizens want more of the colorful $90 trees than the others if possible.

The equation will be :

or

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.

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