On a camping trip, you decide to hang your backpack from a rope stretched between two trees, so bears can’t steal your food while you sleep. The trees are 20 feet apart, and the rope is tied to each tree at a spot 12 feet above the ground. When you hang your backpack on the rope, the weight of the pack pulls the rope down a little—each side of the rope now makes an angle of 15 degrees with the horizontal. That night, a bear comes into your camp and tries to get your backpack with the food in it. Standing on its back legs, the bear can reach 8 feet into the air. Is your stuff safe? (Your backpack is two feet long.)

Yes it is safe.

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.

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step-by-step explanation:

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a