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2 years ago

Simplify 15 to the 18th power over 15 to the 3rd power

1 answer:

8 0

15^15. Answer is 15 to the 15th power because by laws of exponents when you have a base with power m over same base with power n it is base to the m-n power. Simply you subtract the exponents when dividing with same base.

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Johnny has a bag with 84 coins in it. If the ratio of dimes to nickels to pennies is 3 to 2 to 1, how many

omeli [17]

Answer:

Step-by-step explanation:

Number of coins in the bag ⇒ 84

Give that,

Dimes : Nickels : Pennies

3 : 2 : 1

You can see that, there are 6 parts . ( 3 + 2 + 1 = 6 )

And now let us write the types of coins in fractions.

Dimes ⇒ $\frac{3}{6}$

Nickels ⇒ $\frac{2}{6}$

Pennies ⇒ $\frac{1}{6}$

And now they're asking for the number of nickels.

To find that, you can multiply 84 ( number of coins) by it's fraction ( 2/6).

Let us solve.

84 × $\frac{2}{6}$

$\frac{84*2}{6}$

$\frac{168}{6}$

Therfore, there are 28 nickels.

8 0

2 years ago

Input and output and what is input and output.

Genrish500 [490]

Input means adding and output means subtracting. First I wanna tell you something, It's that i am new to brainly and I want you to be my friend so BTW my name is Vanessa and my username is rosebud2007 without capital letters or spaces thanks and bye!

Vanessa!

6 0

2 years ago

Four cards are shuffled and placed face down in front of you. Their faces (hidden) display the four elements: water, earth, wind

Licemer1 [7]

Answer:

probability of winning is $\frac{2}{3}$

Step-by-step explanation:

As it is given , 4 cards are available, there are 4! mean total possible way of ordering is 24

following are the cases of loosing

1) first card is fire.

Thus there are 3! = mean 6 possible ways for particular ordering to occur.

2) If wind is first card and Fire is second. Then, There are 2! = 2 ways to occur.

Hence, the probabiIity of losing is given as $= \frac{6+2}{24}=\frac{1}{3}$

therefore probality of winning is $1 -\frac{1}{3}$

probality of winning is $\frac{2}{3}$

5 0

2 years ago

A population of 40,000 decreases by 3.1% each year. what is the approximate population in 4 years

coldgirl [10]

$\bf \textit{Amount of Population Decay} \\\\ A=Pe^{-rt}\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{initial amount}\dotfill &40000\\ r=rate\to 3.1\%\to \frac{3.1}{100}\dotfill &0.031\\ t=\textit{elapsed time}\dotfill &4\\ \end{cases} \\\\\\ A=4000e^{-0.031(4)}\implies A=40000e^{-0.124}\implies A=\cfrac{4000}{e^{0.124}} \\\\\\ A\approx 35335.194\implies \stackrel{\textit{rounded up}}{A\approx 35335}$

7 0

2 years ago

A beaker contains 0.32 L of water. What is the volume of this water in milliliters?

avanturin [10]

B as the decimal move 1 place

6 0

3 years ago