2 years ago

Han's house is 450 meters from school. Lin’s house is 135 meters closer to school. How far is Lin’s house from school?

Mathematics

1 answer:

Marina86 [1]2 years ago

6 0

Solution:

Note that:

Han's house = 450 m from school
Lin's house = (450 - 135) from school

Looking at the options, we can tell that the letter "z" represents Lin.

=> z = (450 - 135)
=> z = 450 - 135

This option matches with Option D.

Option D is correct.

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What is the approximate surface area of a sphere with a circumference of 37.68

sergij07 [2.7K]

We must find the radius so we can plug this into the formula for surface area.

Circumference = $2 \pi r$
$37.68 = 2 \pi r \\ r = 37.68/2 \pi$

We are going to plug this in as our radius for the most accurate answer.

The surface area of a sphere is $4 \pi r^{2}$

Surface Area = $4 \pi ( \frac{37.68}{2 \pi }) ^{2}$ ≈ 451.93 units