One way is to subsitute the point (-1,5) for every function and see which one gives a true statement
5=10(2)^(-1) is true
5=10(0.5)^-1 is false
5=5(-1) is false
5=5(2)^-1 is false
answer is y=10(2)ˣ
Answer:
The new granite countertop will cost $824.
Step-by-step explanation:
Step 1: The problem is to determine how many yards per square that the countertop is made up of.
This is the equivalent of finding the square area of the countertop.
The formula for the square area of a rectangle is given as L x W.
Where L = Lenght which is equal to 3 yards
W = 1 yard
Step 2:
Cost of per square yard required therefore is
3 x 1 = 3 square Yards.
The granite required for the countertop project therefore will cost:
$206 x 3 = $824.00
Cheers!
Answer:
The unit vectors are:

Step-by-step explanation:
Unit vectors that are a parallel to the tangent line have the same slope than the tangent line, thus we can find the slope of the tangent line, find directional vectors and then their corresponding unit vectors.
Finding the slope of the tangent line.
We can find the first derivative of the curve, which represents the slope of the tangent line of the curve at that point.

At x = 2 we have

Thus we have slope m = 4, then the parallel unit vector has slope m = 4/1
Finding unit vectors.
From the slope m = 4/1, we can write it as a direction vector with x =1 and y = 4. Notice also that x = -1 and y = -4 would have given as as well slope m = 4 too.

Then in order to find the unit vector on that direction we can use the formula

So finding the magnitude we get

Then one unit vector that is parallel to the tangent line is

And the second unit vector is

The negative sign on both x and y components just tell us that we are aiming on the opposite direction as the first unit vector, yet both have the same value of the slope.
The number expressed as a decimal is 0.36
Step-by-step explanation:
First of all, we have to write the ratio between the number of songs from Josiah's favorite band and the total number of songs.
We have:
# of songs of his favorite band = 16
# of total songs = 44
Therefore, the fraction is:

Now we have to express this as a decimal. First of all, we simplify the fraction, by dividing each number by 4, and we get:

Now in order to write this as a decimal, we just use the calculator and we divide 4 by 11, and we get:

which is a periodic number, so we approximate to

Learn more about fractions and decimals here:
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Answer:
The answer is -6 but its not in the option
Step-by-step explanation:

Let x = -5
[(-5)²-1]/(-5+1)
= (25-1)/(-4)
= 24/-4
= -6