Ask question

Ask question

All categories

2 years ago

9

Which word is used to describe a "negative number" in a situation?

1 answer:

mafiozo [28]2 years ago

5 0

Answer:

B. Debit

Step-by-step explanation:

an entry recording an amount owed, listed on the left-hand side or column of an account.

You might be interested in

Why is - t - 3 written as 3 - t? Is it wrong if it is left as -t -3?

Eddi Din [679]

-t-3 and 3-t are not the same since t-3 would result in a negative answer since both -t and -3 are negative. While in t-3 t is positive and -3 is negative. it is wrong if its left as t-3 since -t-3=3-t is false.

4 0

2 years ago

A huge ice glacier in the Himalayas initially covered an area of 454545 square kilometers. Because of changing weather patterns,

guajiro [1.7K]

We have been given that a huge ice glacier in the Himalayas initially covered an area of 45 square kilo-meters. The relationship between A, the area of the glacier in square kilo-meters, and t, the number of years the glacier has been melting, is modeled by the equation $A=45e^{-0.05t}$ .

To find the time it will take for the area of the glacier to decrease to 15 square kilo-meters, we will equate $A=15$ and solve for t as:

$15=45e^{-0.05t}$

$\frac{15}{45}=\frac{45e^{-0.05t}}{45}$

$\frac{1}{3}=e^{-0.05t}$

Now we will switch sides:

$e^{-0.05t}=\frac{1}{3}$

Let us take natural log on both sides of equation.

$\text{ln}(e^{-0.05t})=\text{ln}(\frac{1}{3})$

Using natural log property $\text{ln}(a^b)=b\cdot \text{ln}(a)$ , we will get:

$-0.05t\cdot \text{ln}(e)=\text{ln}(\frac{1}{3})$

$-0.05t\cdot (1)=\text{ln}(\frac{1}{3})$

$-0.05t=\text{ln}(\frac{1}{3})$

$t=\frac{\text{ln}(\frac{1}{3})}{-0.05}$

$t=\frac{\text{ln}(\frac{1}{3})\cdot 100}{-0.05\cdot 100}$

$t=\frac{\text{ln}(\frac{1}{3})\cdot 100}{-5}$

$t=-\text{ln}(\frac{1}{3})\cdot 20$

$t=-(\text{ln}(1)-\text{ln}(3))\cdot 20$

$t=-(0-\text{ln}(3))\cdot 20$

$t=20\text{ln}(3)$

Therefore, it will take $20\text{ln}(3)$ years for area of the glacier to decrease to 15 square kilo-meters.

6 0

2 years ago

Kyle solved 18 of 24 puzzles ina puzzle book. He says that he can use an equivalent fraction to find the percent of puzzles in t

Rashid [163]

$\frac{18}{24} = \frac{9}{12} = \frac{3}{4}$
The percentage is 75℅

8 0

2 years ago

What percent of 180 is 45? A. 4.5% B. 18% C. 22% D. 25%

Ber [7]

Answer:

D. 25%

Step-by-step explanation:

45/180=0.25

0.25 into a percent is 25%

6 0

2 years ago

Read 2 more answers

PLS HELP WILL MARK BRAINLIEST! NO FAKE ANSWERS!<br><br>Name the circle and find mDCF

den301095 [7]

Answer:

Step-by-step explanation:

A circle is named by its center.

Name of the circle: Circle B

∠DCF = 90° {angle on a semicircle is right angle}

8 0

1 year ago

Read 2 more answers