Answer:
13 years
Step-by-step explanation:
It is given that,
Lucinda put $66 into a CD that pays 5.7% interest. According to the rule of 72,
<u>The rule of 72 </u>
It is a simplified way to determine, If we invest some amount, how long that investment will take to double,
<u>Formula
</u>
Let R be the rate of interest,
The time required to take double the amount = 72/R
<u>Calculate the approximate years</u>
According to the rule of 72, approximately 12.63 ≈ 13 years will it take for her money to double
Answer:
Y=5x
Step-by-step explanation:
Y=mx+b, or y=rise/run+starting value
as there is no starting value, we would simply add no variable
rise/run in this equation would 5/1 because when it rises 5, it goes right 1, simplifying that would be 5
Answer:
Step-by-step explanation:
End time = 3 : 31
Elapsed time = <u> 1 : 12 </u> {subtract}
2 : 19
It started at 2:19 PM
Dana made 96 strides.
Step-by-step explanation:
Given,
Ratio of Sally's stride to Dana's strides = 5:4
Strides made by Sally = 120
Let,
x be the strides made by Dana.
Ratio of Sally to Dana = 120:x
Using proportion;
Ratio of Sally's stride to Dana's stride :: Ratio of Sally to Dana

Product of mean = Product of extreme

Dividing both sides by 5

Dana made 96 strides.
Keywords: ratio, proportion
Learn more about proportion at:
#LearnwithBrainly
Answer:
y= 3x + 7 Step-by-step explanation:
y= -1/3x+3 (so, gradient of this line is -1/3).
formula: gradient of line one x gradient of line two= -1 (applies for 2 perpendicular lines only).
So, m1 x -1/3= -1
m1= (
)
m1= 3 (gradient of perp line)
y=mx+c
4= 3 x -1 + c
7=c
therefore, y=3x+7 (eqn of the line perp to y=-1/3x+3)