A teacher needs 256 lengths of string cut to 40cm each. If balls of string are 30M long, how many balls are needed?

Answers

Answer 1

Answer: First you need to work out how much string is needed -
256 pieces needed x 40cm each:
256 x 40 = 10240cm

Then, convert to metres (100cm = 1m)
10240 / 100 = 102.4m

Then, you work out how many balls are needed:
30 can fit into 102.4 3 times with .41m to spare. So, you need three balls of string, PLUS another one to cover the 41cm

So to conclude: 4 balls of string are needed.

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A square has a perimeter of 20 cm what is the length of its diagonal rounded to the nearest tenth

Answers

-- All 4 sides of a square are the same length.
   The perimeter is 20 cm.
   So each side is (20/4) = 5 cm.

-- If you cut the square along its diagonal, and throw one piece away ...

   You have a right triangle.
   The legs are sides of the square ... 5 cm each.
   The hypotenuse is the diagonal of the square, which you have to find.

-- The (hypotenuse of any right triangle)²

   = (the length of one leg)² + (the length of the other leg)² .

   (Diagonal)² = (5 cm)² + (5 cm)²

   (Diagonal)² = (25 cm²) + (25 cm²)

   (Diagonal)² = (50 cm²)

   Diagonal = √(50 cm²) = 7.07 cm

   or 7.1 cm rounded to the nearest tenth.

multiply the length of one side by the square root of 2.

20√2 = 28.28
Rounded to the nearest tenth:
28.28→28.3

28.3 is the final answer

There are 126 different combinations of soups salads, and sandwiches available at a cafe. If there are more choices of sandwiches than choices of salads and fewer choices of soups than salads, how many of each type of food is available at a cafe?

Answers

combinations = #soup x #salad x #sandwich
126 = 2 x 7 x 9 = 3 x 6 x 7 = 2 x 3 x 21
there are more than one answer

Help plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

Answers

Answer: I am 96% its 10.23kg

Hopes this helps please and again please put down as brainlist.

Answer:

um i think is 10.23kg

Step-by-step explanation:hope this helps u

write a compound inequality that represents each situations all real numbers that are greater than -8 but less than 8

Answers

Answer:

-8 < r < 8

Step-by-step explanation:

Let r = real number

Greater than >

r>-8

less than <

r <8

We want a compound inequality so we combine these

-8 < r < 8

Answer:

$-8 < x < 8$

Step-by-step explanation:

Your compound inequality will include two inequalities.

These are:

x > -8

x < 8

Put your lowest number first, ensuring that your sign is pointed in the correct direction.

$-8 < x$

Next, enter your higher number, again making sure that your sign is pointing in the correct direction.

$-8 < x < 8$

arnold full workout consist of 10 minutes of warm-up exercises, 25 minutes of lifting weights, and 15 minutes on the treadmill. What was the ratio of the number of minutes he lifted weights to the total number of minutes of his entire workout?

Answers

The ratio of the number of minutes Arnold lifted weights to the total number of minutes is 1:2 or 1 / 2.

What is ratio?

An ordered pair of numbers a and b, represented as a / b, is a ratio if b is not equal to 0. A proportion is an equation that sets two ratios at the same value.

Given:

Arnold full workout consist of 10 minutes of warm-up exercises, 25 minutes of lifting weights, and 15 minutes on the treadmill,

Calculate the total time of the work-out as shown below,

Total time of workout = Time of warm-up exercises + Time of lifting weights + Time on the treadmill

Total time of workout = 10 + 25 + 15

Total time of workout = 50 minutes,

Calculate the ratio of the number of minutes he lifted weights to the total number of minutes as shown below,

The ratio of the number of minutes he lifted weights to the total number of minutes = Time of lifting weights / Total time of workout

The ratio of the number of minutes he lifted weights to the total number of minutes = 25 / 50

The ratio of the number of minutes he lifted weights to the total number of minutes = 1 / 2.

To know more about Ratios:

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10+25+15 = 50 minutes
25 minutes for lifting weights
25/50 = 1/2

Find the missing value for each rectangular prism. 1. Volume = 6 cu in Length = 3 in Width - 2 in Height = ____
2. Volume = 96 cu yd Length = ____ Width = 6 yd Height = 8yd
3. Volume = 125 cu ft Length = 5 ft Width = ____ Height = 5 ft