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Liula [17]
3 years ago
15

How to work it out now!!

Mathematics
1 answer:
hodyreva [135]3 years ago
3 0
4) Use the formula for the area of a trapezium. Consider what the possible range of the various numbers might be, given their reported value, and how changes in value affect the area.

The area will be in the interval [445, 455) cm^2.
The length of the shorter parallel side will be in the interval [17.5, 18.5) cm.
The length of the longer parallel side will be in the interval [21.5, 22.5) cm.
The area is given by
.. A = (b1 +b2)/2*h
.. h = 2A/(b1 +b2)

h will get smaller when A gets smaller, so we want to do our calculation with the minimum value of A, 445 cm^2.
h will get smaller when b1 and b2 get larger, so we want to do our calculation with the maximum values of those numbers, 18.5 and 22.5 cm.

The minimum value of h will be
.. h = 2*(445 cm^2)/(18.5 cm +22.5 cm) = 21.7 cm


5. In the worst case, the lorry is limited to a load of
.. (14.5 -2.35)/(.255) = 47 . . . . crates

This is computed as the minimum safe additional load divided by the maximum mass per crate.
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Answer:

We know,

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Step-by-step explanation:

8 0
3 years ago
1. If 100% = 80, than 75% = ?
Sindrei [870]

Answer:

60

Step-by-step explanation:

100% = 80,

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5 0
3 years ago
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A caterpillar crawling in a straight line across a coordinate plane starts at point (-3,
Irina18 [472]

9514 1404 393

Answer:

  15

Step-by-step explanation:

In vector form, the equation of point p on the line can be written as ...

  p = (-3, -4) +t(25 -(-3), 38 -(-4)) . . . . . for some scalar t

  p = (-3, -4) +t(28, 42)

  p = (-3, -4) +14t(2, 3)

where t takes on any value between 0 and 1.

If we let t = n/14 for some integer 0 ≤ n ≤ 14, then the coordinates of point p will be integers.

There are 15 values that n can have in the allowed range.

The caterpillar touches 15 points with integer coordinates.

7 0
3 years ago
Please helpppppppppppppp
Helen [10]

Answer:

90/23

Step-by-step explanation:

First, you want to start in the parentheses. 5-6=-1, then multiply it by -2. Since a negative multiplied by a negative is a positive, -2*-1=2. -3^2=-9. 2+8=10. Then -9 times 10= -90. Then, we move on to the bottom. 5--2=7. 4^2=16, and -2(2)=-4. So -5(7) + 16-4=-23. Now, the equation should look like this, -90/-23. Put the negatives together and you get 90/23.

6 0
3 years ago
What is 710,200 written in word form
Julli [10]
<span> For this case we have the following number: 
 710200
 We are going to decompose this number as the sum of three numbers:
</span> 710200 = 700000 + 10000 + 200&#10;
<span> Let's now write each number:
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 200: two hundred
 Therefore, the complete expression is:
 Seven hundred ten thousand two hundred
 Answer:
 Seven hundred ten thousand two hundred</span>
8 0
3 years ago
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