3 years ago

I got two questions I need help with

Mathematics

1 answer:

MArishka [77]3 years ago

8 0

Need a picture to give you answers

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How many liters are in 21 cups? if 1L=4.2cups<br> i don't understand how to do it

Luda [366]

Answer:

5 L

Step-by-step explanation:

As given in question,

1 L can fill 4.2 cups.

So, 1 cup can hold $\frac{1}{4.2}$ L of fluid.

Therefore,

21 cups can hold = $\frac{1}{4.2}$ × 21

= 5 L

So, there is 5 L of fluid in 21 cups.

3 0

3 years ago

Read 2 more answers

Water is building up in a bathtub. After 3 minutes there are 12 gallons of water and after 5, there are 24 gallons of water. Wha

Mariana [72]

Answer:

i think it's 15 gallons

6 0

3 years ago

Jane had 2/3 of a meter of ribbon. She used 1/4 of a meter of ribbon to decorate a card. How much ribbon did she have left after

Vilka [71]

2/3 - 1/4 =
8/12 - 3/12 =
5/12 <==

7 0

3 years ago

Carl Cornfield has been wondering whether he should plant white corn this year. He decides to sample 100 customers. 38% say they

Brrunno [24]

Answer:

true

Step-by-step explanation:

8 0

3 years ago

Rearrange the following equation and solve for x when the hydrogen ion concentration is 0.1 M. pH=5+logx (Recall that pH=−log[H+

lyudmila [28]

Answer:

x=1×10−4

Step-by-step explanation:

we have

$ph=5+logx$ -----> equation A

The pH of a given solution is the negative log base 10 of the concentration of hydrogen ions, H+

ph=-log[H+]

In this problem we have the concentration of hydrogen ions

[H+] =0.1 M

That means that the pH of the solution will be

ph=-log[0.1]

Rewrite

ph=-log[10^-1]

ph=-(-log10)

Remember that

log10=1

substitute

ph=-(-1)

ph=1

substitute the value of ph in equation A and solve for x

$1=5+logx$

$logx=1-5$

$logx=-4$

applying property of logarithms

$x=10^{-4}$

8 0

3 years ago