Do you know foil? FOIL= First,Outside,Inside, and Last
Nice and simple. PEMDAS. Parentheses, exponents, multiple, division, addiction, subtraction.
The first thing you do is solve the numbers in the parenthesis, which would turn to
(312) + (714) = 1026
To find the surface area of a prism (or any other geometric solid) we open the solid like a carton box and flatten it out to find all included geometric forms. To find the volume of a prism (it doesn't matter if it is rectangular or triangular) we multiply the area of the base, called the base area B, by the height h.
<span>Using what's given, you'd have $2800 = p x 0.04 x 3.5. </span>
<span>We don't know the principle so you'd leave the variable there and convert 4% interest to 0.04. Solve by getting 2800 = p(0.14) then divide each side by 0.14 and get p=20,000. So your principle, or the amount deposited, should be $20000. You can solve by plugging in your answer (20000 x 0.04 x 3.5 = 2800)
</span>Interest = Principal * rate * time
<span>2800 = x * 4% * 3.5 </span>
<span>2800/(4% *3.5) = x </span>
<span>20000 = x
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