A racing car used 255 litres of fuel to complete a 340km race.on average,how many litres of fuel did the car use every 100km?

The maximum number of marks attainable at a mathematics competition is 60 suppose you obtained 40 marks your brother obtained 46

mixer [17]

Answer:

You = bronze

Your brother = silver

Your sister = gold

Step-by-step explanation:

Your marks: 40/60

Your brother's marks: 46/60

Your sister's marks: 49/60

You can simplify the fractions, but you don't have to:

40/60 = 2/3

46/60 = 23/30

49/60 = 49/60

Now, divide each of the numerators by the denominators (turn the fraction into a decimal).

2/3 = 0.6667

23/30 = 0.7666667

49/60 = 0.8166667

(Note that these are all approximations as the real answers go on forever)

Lastly, multiply them all by 100 to get the percent.

0.6667 x 100 = 66.67% - bronze

0.76667 x 100 = 76.667% - silver

0.816667 x 100 = 81.6667% - gold

3 0

2 years ago

The group is planning to build a fence around the garden. How many yards of fencing materials do they need for the fence? Show y

garri49 [273]

Answer:

They need 130 yds to build up the fence.

Step-by-step explanation:

Attached you can find a picture that will guide the explanation. We will assume that each line is supposed to be a fence. We will assume also that the diagonals that cross any subfield that has the same vegetable is unnecessary. That is that the diagonal of the tomatoes and the watermelon are not going to be built.

Recall that the red peppers area is a right triangle. So, using pythagora's theorem, we have that

$b^2 +12^2 = 15^2$ so $b=15^2-12^2$

which gives us that b = 9.

On the same fashion, the diagonal of the spinach-celery sector is $\sqrt[]{8^2+6^2}=10$ . Recall that the field is a rectangle, so the perimeter of the outter fence is 2*(12+6)+2*(8+9) = 70 yds. Then, the total perimeter is given by

outter fence (70)+

fence spinach-watermelon (8) +

fence red peppers-watermelon(12)+

fence red peppers-carrots (15)+

fence carrots-tomatoes (9)+

fence celery-tomatoes(6) +

fence spinach-celery(10)

= 130 yds

(if the diagonals of tomatoes and watermelon are added, the same procedure applies. watermelon diagonal is 14.42 yds and tomatoes diagonal is 10.81 yds)