Find the total amount of interest earned on this savings account. Time: 7 years Interest Rate: 2.5% Principal: $4,556 Interest:

2 answers:

9 0

Interest rate is a portion of a loan that is charged as interest. Usually, it is expressed as an annual interest rate. It has two types which are the simple interest rate and the compounding interest rate. For this, we have a simple interest rate. Calculations are as follows:

Interest earned = 4556 x 0.025 x 7 = $797.3

nataly862011 [7]3 years ago

9 0

it is, C. $797.30 because 2.5% of $4556 is 182.24

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gtnhenbr [62]

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write a linear equation that intersects y=x^2 at two points. Then write a second linear equation that intersects y=x^2 at just o

Liula [17]

We know that $y = x^2$ is a parabola, concave up, with vertex in the origin $(0,0)$

So, we may use three horizontal lines for our purpose: any horizontal line above the x axis will intersect the parabola twice. The x axis itself intersects the parabola once on the vertex, while any horizontal line below the x axis won't intercept the parabola.

Here's the examples:

The horizontal line $y = 4$ intercepts the parabola twice: the system $y = x^2,\ y = 4$ is solved by $x^2=4 \implies x = \pm 2$
The horizontal line $y=0$ intercepts the parabola only once: the system is $y=x^2,\ y=0$ which yields $x^2=0\implies x=0$ which is a repeated solution
The horizontal line $y=-5$ intercepts the parabola only once: the system is $y=x^2,\ y=-5$ which yields $x^2=-5$ which is impossible, because a squared number can't be negative.