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Romashka [77]
1 year ago
12

Sarah spends 1/6 hour vacuuming her mom's car. She spends 4 times as long washing the car. Then she spends twice as long waxing

the car as she does washing the car. What is the total amount of time Sarah spends vacuuming, washing, and waxing her mom's car?
Mathematics
1 answer:
juin [17]1 year ago
3 0

your answer will be 2 hours and 10 minutes

mark brainliest




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A length is measured as 21cm correct to 2 significant figures. what is the upper bound for the length?​
Leno4ka [110]

the upper bound for the length is  21.5  cm .

<u>Step-by-step explanation:</u>

Lower and Upper Bounds

  • The lower bound is the smallest value that will round up to the approximate value.
  • The upper bound is the smallest value that will round up to the next approximate value.

Ex:- a mass of 70 kg, rounded to the nearest 10 kg, The upper bound is 75 kg, because 75 kg is the smallest mass that would round up to 80kg.

Here , A length is measured as 21cm correct to 2 significant figures. We need to find what is the upper bound for the length . let's find out:

As discussed above , upper bound for any number will be the smallest value in decimals which will round up to next integer value . So , for 21 :

⇒ 21.5  cm

21.5 cm on rounding off will give 22 cm . So , the upper bound for the length is  21.5  cm .

7 0
1 year ago
The graph shows the average shoe size for a baby or toddler as a function of age in months. What shoe size would be recommended
mojhsa [17]

Answer: The  shoe size would be recommended for a four-month-old baby is equal to 1

Step-by-step explanation:

Since, according to the given figure,

Here, x represents age of baby (in month) while y represents shoe size.

And for babies , 0 the shoe size = 0

3 the shoe size = 1

6 the shoe size = 2

9 the shoe size = 3

12 the shoe size = 4

thus, from the above we can say that, the shoe size of the baby who is 4 month old is 1.

7 0
1 year ago
Read 2 more answers
If r is the midpoint of qs rs=2x-4, st= 4x-1 and rt = 8x-43 find qs
sammy [17]

Answer:

QS=68\ units

Step-by-step explanation:

step 1

Find the value of x

we know that

r is the midpoint of qs

so

QR=RS

QS=QR+RS------> QS=2RS -----> equation A

RT=RS+ST ----> equation B

see the attached figure to better understand the problem

Substitute the given values in the equation B and solve for x

8x-43=(2x-4)+(4x-1)

8x-43=6x-5

8x-6x=43-5

2x=38

x=19

step 2

Find the value of RS

RS=2x-4

substitute the value of x

RS=2(19)-4

RS=34\ units

step 3

Find the value of QS

Remember equation A

QS=2RS

so

QS=2(34)=68\ units

6 0
1 year ago
7 people out of the 99 visitors bought a gift. About ___% of the visitors bought a gift.
ArbitrLikvidat [17]

Answer:

About 7.07% of the visitors bought a gift.

Step-by-step explanation:

7/99 = 0.0707

0.0707 *100 = 7.07%

then:

About 7.07% of the visitors bought a gift.

5 0
1 year ago
A store sells both cold and hot beverages. Cold beverages, c, cost $1.50, while hot beverages, h, cost $2.00. On Saturday, drink
Marina86 [1]
2h + 4h  (1.5c) = 360 so option b is correct.
3 0
1 year ago
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