45:10 I think ? .. that’s how my teacher did it
Answer:
The blank would be 64 and the answer would be 16
Step-by-step explanation:
Because we are looking for 25% of something, we simply multiply .25 by whatever that number is. So we start with
.25 * ________
And then we put the number in
.25 * 64 = 16
Answers:
- a) 15000 represents the starting amount
- b) The decay rate is 16%, which means the car loses 16% of its value each year.
- c) x is the number of years
- d) f(x) is the value of the car after x years have gone by
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Explanation:
We have the function f(x) = 15000(0.84)^x. If we plug in x = 0, then we get,
f(x) = 15000(0.84)^x
f(0) = 15000(0.84)^0
f(0) = 15000(1)
f(0) = 15000
In the third step, I used the idea that any nonzero value to the power of 0 is always 1. The rule is x^0 = 1 for any nonzero x.
So that's how we get the initial value of the car. The car started off at $15,000.
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The growth or decay rate depends entirely on the base of the exponential, which is 0.84; compare it to 1+r and we see that 1+r = 0.84 solves to r = -0.16 which converts to -16%. The negative indicates the value is going down each year. So we have 16% decay or the value is going down 16% per year.
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The value of x is the number of years. In the first section, x = 0 represented year 0 or the starting year. If x = 1, then one full year has passed by. For x = 2, we have two full years pass by, and so on.
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The value of f(x) is the value of the car after x years have gone by. We found that f(x) = 15000 when x = 0. In other words, at the start the car is worth $15,000. Plugging in other x values leads to other f(x) values. For example, if x = 2, then you should find that f(x) = 10584. This means the car is worth $10,584 after two years.
Answer:
The time that pass until only two cookies left is 1.89 hour
Step-by-step explanation:
Given as :
The number of cookies bakes in 2 hours = 3 dozen
∵ 1 dozen = 12 piece
So, In 3 dozen = 12 × 3 = 36 cookies
The Time required to bake 36 cookies = 2 hours
Now, Let The time required to bake 2 cookies = x hour
So, According to question
∵ The time required to bake 36 cookies = 2 hours
So, the time required to bake 1 cookies = 
= 
hour
∴The time required to bake 34 cookies = × 34
I.e The time required to bake 34 cookies = 
hour = 1.89 hour
Or, the time taken is 1.89 hours
Hence The time that pass until only two cookies left is 1.89 hour Answer
