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Eduardwww [97]
3 years ago
13

On Monday, Nalim made a journey.

Mathematics
1 answer:
xenn [34]3 years ago
3 0

Answer:

Step-by-step explanation:

Let's put in some numbers to make this easier to understand.

Let's say she has to travel 20 km.

On Monday, she travels at 4 kph.  This takes 5 hours.

On Tuesday she travels 25% faster, at 5 kph.  This takes 4 hours.  

To figure percent reduction we take

100 % * (old - new) / old  

100 % * (5 hr - 4 hr ) / 5 hr

100 % * 1 hr / 5 hr

100 % * 0.20

20% reduction.

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Pls answer I will mark brainliest
Lina20 [59]

Answer:

268.08

Step-by-step explanation:

first you take your radius and put it in the equation V=4/3πr³ when you insert the 4 you calculate it to get 268.08257

3 0
2 years ago
Read 2 more answers
If the number of bacteria in a colony doubles every 210 minutes and the population is currently 8,000 bacteria, what will the po
marin [14]

Answer:

in 630 minutes, the population of the bacteria  will  64,000

Step-by-step explanation:

current population of the bacteria = 8,000

and this population doubles every 210 minutes

0 (minute) ------------------------ 8,000 bacteria

210 + 0 (210 minutes) -------------------- 2 x 8,000 = 16,000 bacteria

210 + 210 ( 420 minutes) -------------------- 2 x 16,000 = 32,000 bacteria

420 + 210 (630 minutes) -------------------- 2 x 32,000 = 64,000 bacteria

Therefore, in 630 minutes, the population of the bacteria  will  64,000

3 0
4 years ago
Guys please help me with this question
diamong [38]

Answer: Can I get brainliest and 5 stars? thank you.

a) \frac{65}{99}

b) \frac{59}{90}

c) \frac{13}{20}

Step-by-step explanation:

a) 0.65 I can't put line above it, but the line expresses that 6 and 5 and repeating infinitely. Let X equal the decimal number.

x=0.65

First multiply by 1 followed by as many zeros as repeating numbers there are. In this case since 6 and 5 are the repeating numbers, we have to add 2 zeros which is basically multiplying by 100

0.65*100=65.65 (another 65 remains on the right because they're infinite.)

Now substract from the original number. Now we have a new equation that says: 100x=65.65.

Substract equation 1 from equation 2.

100x=65.65\\-x=0.65

---------------------------------

99x=65

Solve just like any other equation. Divide by 99 to isolate x.

\frac{99x}{99}=\frac{65}{99}

x=\frac{65}{99} This is the fraction.

------------------------------------------------------------------------------------------------

b) 0.65^-This one is a little bit different because we only have 1 repeating number.

In this case we have to multiply by 10.

0.65^-*10=6.55^-

Equation 1: x=0.65^-

Equation 2: 10x=6.55^-

Substract.

10x=6.55^-\\-x=0.65^-

-----------------------

9x=5.9

divide by 9 to isolate x

\frac{9x}{9}=\frac{5.9}{9}

x=\frac{5.9}{9}

To get rid of the decimal in the numerator, multiply both numerator and denominator by 10 so that we don't change the fraction.

x=(\frac{5.9*10}{9*10} )

x=\frac{59}{90} and this is your fraction.

------------------------------------------------------------------------------------------------------

c) 0.65 this one has no repeating number. It's a finite decimal number.

I assume you already know that; a=\frac{a}{1}, so, we can do the same here to have a fraction.

0.65=\frac{0.65}{1}

Now, in order to get rid of the decimal, multiply by 1 followed by as many zeros as decimal numbers are. In this case 2 zeros because there are 2 decimal numbers, so it's 100. Remember that if you do it in the numerator, you have to do it in the denominator as well to not change the fraction.

\frac{0.65*100}{1*100} =\frac{65}{100}

Simplify if possible.

\frac{65/5}{100/5} =\frac{13}{20} This is your fraction.

6 0
3 years ago
QUICK! WILL MARK BRAINLIEST!!
vova2212 [387]

Answer: They are not congruent.

Step-by-step explanation:

You need to find the distance between these points to find congruence. If just one of these doesn't match with its corresponding side, its not congruent.

DE: square root of 68

_

GH: square root of 53

DE and GH are corresponding, but they are not congruent so these polygons are not congruent.

4 0
4 years ago
What is the factored form of this expression?
Usimov [2.4K]

Answer: B. (4t - 3)(t - 6)

Step-by-step explanation:

(4t - 3)(t - 6)

= 4t^2 - 24t - 3t + 18

= 4t^2 - 27t + 18

3 0
3 years ago
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