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My name is Ann [436]
3 years ago
8

Write a rule that tell how to use mental math to find the product 30,000 x 50,000​

Mathematics
1 answer:
USPshnik [31]3 years ago
3 0

Answer:

1,500,000,000

Step-by-step explanation:

First multipy the first digits, which are the ones that do not contain zero.

then put all of the zeros at the end, so product will be 1,500,000,000 because their are 8 zeros in total

if you check with calculator, you get 1,500,000,000

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Mason invests money in an account paying simple interest. He invests $70 and no money is added or removed from the investment. A
Lisa [10]

answer: 5%

explanation: subtract the principal from the total amount, then divide the difference by the principal

>> 73.50 - 70 = 3.50

3.50 / 70 = 0.05

0.05 x 100 = 5%

4 0
3 years ago
The length of a rectangle is (3 + √7)m and its width is (1 + 2√7)n. What is the
Andru [333]

Answer:

A=(17+7\sqrt7)\ m^2

Step-by-step explanation:

Given that,

The length of the rectangle, l=(3+\sqrt7)\ m

The width of the rectangle, b=(1+2\sqrt{7} )\ m

We need to find the area of the rectangle. We know that the area of the rectangle is given by :

A=l\times b

Put all the values in the above formula.

A=(3+\sqrt7)\times (1+2\sqrt7)\\\\=3+3\times 2\sqrt7 +\sqrt7+2(\sqrt7)^2\\\\=3+6\sqrt7+\sqrt7+14\\\\=(17+7\sqrt7)\ m^2

So, the area of the rectangle is (17+7\sqrt7)\ m^2.

7 0
3 years ago
A box of baseball cards is $25.00 with %15 off. What is the sale price of the box of cards? In other words, how much is it after
yan [13]

Answer:

21.25

Step-by-step explanation:

you would multiply 25 by 0.15 to get the percent being taken off then subtract that from your original price

8 0
4 years ago
S
Nitella [24]

Answer:

s inversely proportional 1/t

s=0.3, t=8

s=k/t

0.3=k/8

k=0.3×8

k=2.4

find s when t=0.4

s=2.4/0.4

s=6.0 or 6

3 0
3 years ago
Find the distance between ( 9,18) and (21,18) in coordinate grid
grandymaker [24]
| 9 - 21 |

| -12 |

The distance between (9,18) and (21,18) is 12.

5 0
3 years ago
Read 2 more answers
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