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4 years ago

How would I know the domain and range? - Algebra 2

Mathematics

1 answer:

kvv77 [185]4 years ago

4 0

Domain: Set of all real numbers

Range: $-1 \le y \le 1$ where y is a real number

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The domain is the set of real numbers because there are no restrictions on what to plug in for x. There are no gaps, holes, jumps, or asymptotes. The graph continues on in both directions stretching to both infinities (this is indicated by the arrows on the curve ends)

The range is the set of y values between -1 and 1 because this is the set of y outputs. The largest y can get is +1 or just 1. The smallest y can get is -1. The value of y can be any number in between as there are no gaps.

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Use I = PRT to find the total amount in the savings account.

slamgirl [31]

Answer:

$\boxed {\boxed {\sf \$ 1803.80}}}$

Step-by-step explanation:

We are using the formula I=PRT and calculating simple interest.

$I=PRT$

I is the interest, P is the principal or starting amount, R is the interest rate as a decimal, and T is the time in years.

We know that there is $1555.00 at 8% for 2 years. First, convert the interest rate to a decimal. Divide the rate by 100 or move the decimal place 2 spots to the left.

8/100 = 0.08
8. --> 0.8 --> 0.08

Now we know all the values:

P= 1555.00
R= 0.08
T= 2

Substitute the values into the formula.

$I= (1555.00)(0.08)(2)$

Multiply.

$I=124.4(2)$

$I=248.8$

The account earned $248.80 in interest, but the question asks for the total amount in the account. We must add the interest to the starting amount.

$1555.00 +248.80$

$1803.8$

After 2 years, the savings account had $1803.80

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