The formula is
A=p (1+r)^t
A future value 6678
P present value 5300
R interest rate 0.065
T time?
6678=5300 (1+0.065)^t
6678/5300=(1+0.065)^t
Take the log for both sides
Log (6678/5300)=t×log (1+0.065)
Divide both sides by log (1+0.065)
T=(log(6,678÷5,300)÷log(1+0.065))
T=3.7 years
Hope it helps!
Answer:
He can buy 4 model cars
Step-by-step explanation:
∵ His total money = the cost of books + the cost of model cars
∵ He buys 6 books and the price of each book is $2
∵ The cost of each model car is $7 , let the number of model cars is c
∵ He has $40
∴ 6 × 2 + 7 × c = 40
∴12 + 7c = 40
∴ 7c = 40 - 12 = 28
∴ c = 28/7 = 4
∴ He can buy 4 model cars
The equation of parabola is y = -8(x -3)² - 9.
<h3>Define parabola.</h3>
A parabola is an approximately U-shaped, mirror-symmetrical plane curve in mathematics. It corresponds to a number of seemingly unrelated mathematical descriptions, all of which can be shown to define the same curves. A parabola can be described using a point and a line.
Given Data
Focus = (3, -9)
Directrix: y = -5
The focus-passing line has an equation of x = -5 that is perpendicular to the directrix. The symmetry line of a parabola is seen here.
The parameter of the parabola is the separation between the focus and the directrix, so
p = -9 - 3
p = -12
p = 12
The distance between the focus and the directrix is divided into two equal portions by the parabola's vertex, which is located on the line of symmetry. Its coordinates are as follows: (3,-9).
Since a parabola moves in the opposite direction of y, its equation is
y -(-9) = -2(4(x -3)²)
y + 9 = -8(x-3)²
y = -8(x -3)² - 9
The equation of parabola is y = -8(x -3)² - 9.
To learn more about parabola, visit:
brainly.com/question/13804934
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Answer: I subtracted 8 from both sides then divided 3 on both sides
Step-by-step explanation: welcome
Answer: It has 1000 square roots
Step-by-step explanation:
