12
8
3
2
Answer:
maximum at (4, 9)
Step-by-step explanation:
The equation of a parabola in vertex form is
y = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
y = - 1(x - 4)² + 9 is in this form
with vertex = (4, 9)
• If a > 1 then vertex is a minimum
• If a < 0 then vertex is a maximum
here a = - 1 , hence vertex (4, 9) is a maximum
The interest earned at $350 at 3% for 10 years is $105
Simple interest is a method of calculating the interest charge. Simple interest can be calculated as the product of principal amount, rate and time period.
Simple Interest = (Principal × Rate × Time) / 100
Given;
P = $350
r = 0.03
t = 10 years
The interest earned;
I =I = P × r × t
I =350 × 0.03 ×10
I = $105
Therefore, the interest earned will be $105
Learn more about simple interest here;
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