A motorboat takes 40 minutes to travel 20 miles downstream. The return trip takes 60 minutes. What is the speed of the current?

A biologist counted 10,000 migrating Monarch butterfly how many do you express 10,000 as a power of 10 Monarch butterfly how man

PSYCHO15rus [73]

Answer:

10^4

Step-by-step explanation:

To express

10000

as a power of

10

, you need to determine how many times you need to multiply

10

by itself in order to get

10000

.

Recall that the number of zeros after the

1

in

10000

represents the number of times you multiply

10

by itself. Since there are

4

zeros after the

1

,

10

is multiplied by itself four times.

4 0

3 years ago

Explain why 17 tens and 107 tens have the same value

olga nikolaevna [1]

They do not have the same value because 17 times 10 is 170 because all u need to do is add a zero at the end

5 0

4 years ago

A movie is 17/8 hours long after 45 minutes how much time is left

Luda [366]

Answer:

82.5 minutes

Step-by-step explanation:

We have to figure out how many minutes are in 17/8 hours. 17/8 = 2 1/8 hours. We know that 2 hours is 120 minutes.

1/8hours x 60 min = 7.5 minutes.

120 + 7.5 = 127.5 minutes then subtract out 45. That leaves 82.5 minutes.

5 0

1 year ago

Martha invested a principal amount of $15,000 into a savings account that earns simple interest at a rate of 4.5% per year. How

lidiya [134]

Option A

The simple interest earned over 6 years is $ 4050

Solution:

Martha invested a principal amount of $15,000 into a savings account that earns simple interest at a rate of 4.5% per year

The formula for simple interest is given as:

$Simple\ Interest = \frac{p \times n \times r}{100}$

Where, "p" is the principal and "n" is the number of years and "r" is the rate of interest

From given,

p = 15000

r = 4.5 %

n = 6 years

Substituting the values we get,

$Simple\ Interest = \frac{15000 \times 4.5 \times 6}{100}\\\\Simple\ Interest = 150 \times 4.5 \times 6\\\\Simple\ Interest = 4050$

Thus simple interest earned over 6 years is $ 4050

6 0

3 years ago

Sandra saves 8% of her salary for retirement. This year her salary was $2,000 more than in the previous

Tanya [424]

Answer:

$\$40000$

Step-by-step explanation:

Let's start by finding Sandra's salary this year.

We are given that she saved $3,360 or 8% of her total salary this year.

Let's represent her total salary this year as "x" and set up an equation:

$\$3360=8\%x\\$

Note that any percentage is equivalent to that number over 100.

$$3360=\frac{8}{100}x$

Multiply 100 to both sides:

$336000=8x$

Divide both sides by 8

$x=42000$

The question states "this year her salary was $2000 more than in the previous year".

This means that her salary in the previous year is equivalent to:

$42000-2000=40000$

4 0

3 years ago