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faltersainse [42]
3 years ago
11

Help what is the correct answer *answer and questions attached*

Mathematics
1 answer:
Mariulka [41]3 years ago
4 0

Answer:

B

Step-by-step explanation:

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how much of a radioactive kind of bismuth will be left after 40 min if the half life is 20 min and you start with 960 grams?
Darya [45]
If the half life is 20 minutes, then in 40 minutes there is 2 half lives. At the end of Each half life, you will have 1/2 of the sample remaining. So...

After 20 min you have

960/2 = 480

After 40 minutes you will have

480/2 = 240 grams
8 0
4 years ago
The cost of tuition at a college is $12,000 and is increasing at the rate of 6% each year. Use exponential function to find the
Gnesinka [82]

Answer:

The cost of tuition fee after 4 years is $15,149.72.

Step-by-step explanation:

Exponential function:

A=P(1+r)^n

A= the amount after n years

P= Initial amount

r= rate of increasing

n= time in years

The cost of tuition at a college is $12,000. It is increasing at the rate of 6% each year.

Here, P= $12,000, r= 6%= 0.06, n= 4 years.

\therefore A=12,000(1+0.06)^4

\Rightarrow A= 12000(1.06)^4

        =$15,149.72

The cost of tuition fee after 4 years is $15,149.72.

7 0
4 years ago
The repayment schedule is for a $1,300 loan at 7.5% for 6 months. What is the amount for interest at payment 5?
max2010maxim [7]

Answer: The answer is $2.77.


Step-by-step explanation:   Given that we have to pay the loan of $1300 at interest rate of 7.5% in 6 months. According to the table,

Amount for interest in payment 1 = $8.13,

Amount of interest in payment 2 = $6.79

and

Amount of interest in payment 3 = $5.45.

We can see here that the difference in the amounts to be paid in consecutive months will be same, i.e., the payments will form an arithmetic progression (A.P.).

The common difference = 8.13-6.79=6.79-5.45=1.34.

Therefore, amount of interest in payment 4 = $(5.45-1.34) = $4.11

and amount of interest in payment 5 = $(4.11-1.34) = $2.77.

Please see the attached modified table.

Thus, the answer is $2.77.

4 0
3 years ago
Read 2 more answers
What is the slope of (-9, 8) and (3,- 12)
earnstyle [38]

Answer:

Your slope would be -5/3

Step-by-step explanation:

To find the slope from two points, you would use the formula y2-y1/x2-x1

In this case, the equation would look like -12-8/3-(-9)

-12 - 8 = -20

3 - (-9) = 12

-20/12 = -5/3

3 0
3 years ago
Read 2 more answers
How is 2 hours and 30 minutes more than 10% of the day
matrenka [14]
In order to find what 10% of a day is:

A day is 24 hours long.

Divide 24 by 100, then multiply the answer by 10.

24/100=0.24
0.24*10=2.4

So, 10% of the day is 2.4 hours.

2 hours and 30 minutes can be written as a decimal as 2.5.

So, 2 hours and 30 minutes is slightly more than 10% of the day.
4 0
3 years ago
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