Which answer is the explicit rule for the sequence 12.5,11,9.5,8,6.5, ?

aₙ = 12.5 - 1.5(n - 1)

Step-by-step explanation:

We use the general equation

aₙ = a₁ + d(n - 1)

aₙ is the term we want

a₁ is the first term (12.5)

d is the common difference (-1.5) as we go through the sequence we see a common difference of -1.5

n is the term number (if we wanted the third term n would be 3)

Step-by-step explanation:

The drawing of the lake has the scale of 1 centimeter to 80 meters.

Now, the actual width of the scale is of 1000 meters.

To find out the width of the lake on the drawing we need to convert the actual length as per the scale drawing.

Since we know that in the given scale drawing we have,

1 centimeter = 80 meters

Or we can say that

80 meters = 1 centimeter

1 meter =  meter

Now, 1000 meters should be equivalent to

centimeters.

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