I do I work out part B?

Mathematics

1 answer:

Marrrta [24]3 years ago

8 0

Part A , your answer is not right

sin A = 8√3 / 16 = √3 / 2

answer is B. √3 / 2

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part B.
It's 30 60 90 right triangle so <B = 30

answer
A. 30

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max2010maxim [7]

So for this problem, we will be using the exponential equation format, which is y = ab^x. The a variable is the initial value, and the b variable is the growth/decay.

Since our touchscreen starts off at a value of 1200, that will be our a variable.

Since the touchscreen is decaying in value by 25%, subtract 0.25 (25% in decimal form) from 1 to get 0.75. 0.75 is going to be your b variable.

In this case, time is our independent variable. Since we want to know the value 3 years from now, 3 is the x variable.

Using our info above, we can solve for y, which is the cost after x years.

$y=1200*0.75^3\\y=506$