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2 years ago

Work out the following calculations and give your answers to the nearest 1000 a) 251 x 638

Mathematics

2 answers:

Ilya [14]2 years ago

4 0

It’s 160,130 nearest 100 is 160,200

Svetllana [295]2 years ago

4 0

Answer:

160,000

Step-by-step explanation:

251

× 638

_______________

2008

753

+ 1506

__________________

160138

Product to the nearest thousand = 160,000

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4. How fast was a driver going if the car left skid marks that were 32 feet long on dry concrete? (The coefficient of friction i

Monica [59]

Answer:

$v_{o} \approx 31.247\,mph$

Step-by-step explanation:

The deceleration experimented by the car is the product of kinetic coefficient of friction and gravitational constant:

$a = \mu_{k}\cdot g$

$a = (1.02)\cdot \left(32.174\,\frac{ft}{s^{2}} \right)$

$a = 32.817\,\frac{ft}{s^{2}}$

The initial speed is computed from the following kinematic expression:

$v^{2} = v_{o}^{2} - 2\cdot a \cdot \Delta s$

$v_{o} = \sqrt{v^{2}+2\cdot a\cdot \Delta s}$

$v_{o} = \sqrt{\left(0\,\frac{ft}{s} \right)^{2}+2\cdot \left(32.817\,\frac{ft}{s^{2}} \right)\cdot (32\,ft)}$

$v_{o}\approx 45.829\,\frac{ft}{s}$

$v_{o} \approx 31.247\,mph$

8 0

3 years ago

PLEASE ANSWER THIS ASAP I WILL MARK YOU THE BRAINLIEST

emmasim [6.3K]

Answer = 314.2

Area of cyclinder:
Area at base x height

Pi = 3.142

5^2 x 3.142 = 78.55

78.55 x 4 = 314.2

5 0

3 years ago

81.098 rounded to hundredths

pantera1 [17]

The answer is 81.1 because since the 9 place value above 5, you round the number in front of it to 1. so the answer is 81.1. I hope that helps.

3 0

3 years ago

Evaluate the expression

andreev551 [17]

Step-by-step explanation:

this is correct answer thank you

3 0

3 years ago

Find the sum of the first 56 terms of the sequence {-8,-1, 6, ...}.

torisob [31]

Answer:

Step-by-step explanation:

S56=56/2[2(-8)+(56-1)7]

S56=10332

4 0

3 years ago