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3 years ago

Helppppppppppppppppppppppppppp

Mathematics

1 answer:

NISA [10]3 years ago

4 0

Area of cylinder = 2 pi r h + 2 pi r^2
= 2 * 3.14 * 4 * 12 + 2 * 3.14 * 4^2
= 301.44 + 100.48
Area of cylinder = 401.92 cm^2

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Write each number in scientific notation. 1. 14,700

grigory [225]

1.) 1.47 x 10^4 is the correct answer

8 0

3 years ago

a machine made 2 2/6 pencils in 3 3/4 minutes. how many pencils would the machine have made after/minute

erma4kov [3.2K]

Question:

A machine made 2 2/6 pencils in 3 3/4 minutes. How many pencils would the machine have made after 9 minutes?

Answer:

$\frac{504}{90}\ or\ 5.6$ pencils is made after 9 minutes

Solution:

Given that,

A machine made 2 2/6 pencils in 3 3/4 minutes

Which means,

$2\frac{2}{6} = \frac{14}{6}$

$3\frac{3}{4} = \frac{15}{4}$

Let "x" be the number of pencils made in 9 minutes

Therefore,

$\frac{14}{6}\ pencils = \frac{15}{4}\ minutes\\\\x\ pencil = 9\ minutes$

This forms a proportion and we can solve by cross multiplying

$\frac{14}{6} \times 9 = \frac{15}{4} \times x\\\\x = \frac{14}{6} \times 9 \times \frac{4}{15}\\\\x = \frac{504}{90}\\\\x = 5.6$

Thus, $\frac{504}{90}\ or\ 5.6$ pencils is made after 9 minutes

7 0

3 years ago

What is 3.5/9 as a fraction

Klio2033 [76]

3.5 / 9

(35 / 10) /9

35 / 10 ÷ 9

35 / 10 × 1/9

35 / 90

5 into 35 is 7, and 5 into 90 is 18

7 / 18

So it is 35 / 90 or 7 / 18.

8 0

3 years ago

Hannah is giving her sister a softball for her birthday, and wants to put it in a cubic gift box to preserve the surprise. She w

Inga [223]

Answer:

B. E(s) = s^3 - 29.

Step-by-step explanation:

The amount of empty space $E(s)$ inside the cubic box is equal to the volume of the box minus the volume of the softball.

If the side length of the cubic box is $s$ , and the volume of the softball is $29in^3$ , then the amount of empty space $E(s)$ inside is

$E(s) = s^3-29$ ,

where $s^3$ is the volume of the cubic box.

Since it matches the equation we got above, choice B stands correct.

4 0

3 years ago

If a heptagon has an area of 105 in2, what is the measure of one side ?

kumpel [21]

Answer:

5.38 inches

Step-by-step explanation:

The formula for Area of an Heptagon

= A=7/4a²cot(180°/7)

Area = 105in²

Side a = ?

The formula for Side a

= √4A ×tan (180°/7)/7

= √4 × 105 × tan (180°/7) /7

= 5.37536 inches

Approximately = 5.38 inches.

4 0

3 years ago