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patriot [66]
3 years ago
12

Helppppppp!!!!! me plz i need help

Mathematics
2 answers:
____ [38]3 years ago
6 0
0.3 mm = 0.03 cm

85 * 0.03 + 2.4 = 4.95 cm


<span>I hope this helps</span>
jekas [21]3 years ago
3 0
It's is 4.95 hope it helps
You might be interested in
Daniel can paint a house in 10 days, while his father can paint the same house in 6 days. If they work together, how long will t
Alex73 [517]

Answer:

3\frac{3}{4} days

Step-by-step explanation:

Let the amount of work be x.

Daniel:

10 days = x

1 day = \frac{1}{10}x

Father:

6 days = x

1 day = \frac{1}{6}x

Together:

1 day = \frac{1}{10}x + \frac{1}{6}x

        = \frac{6}{60}x + \frac{10}{60}x

        = \frac{16}{60}x

        = \frac{4}{15}x

No. of days = \frac{15}{15}x ÷ \frac{4}{15}x

                   = \frac{15}{15}x × \frac{15}{4}x

                   = \frac{225}{60}

                   = 3\frac{3}{4}

4 0
2 years ago
Example 2
PIT_PIT [208]

Answer: (a) 314.2cm², (b) 157.1cm², (c) 78.55cm² (e) 6.77

Step-by-step explanation: (a)  Area of the circle with radius of 10 cm = πr²

                                                                          = 3.142 × 10 × 10

                                                                          = 3.142 × 100

                                                                          = 314.2cm²

The formula                                                       = πr²

(b)  Area of the half of a circle known as semicircle

                                                                         = πr²/2

                                                                         = 3.142 ×10 × 10/2

                                                                         = 3.142 × 50

                                                                         = 157.1cm²

The formula                                                      = πr²/2

(c)  A quarter of a circle is called quadrant

                                                            = πr²/4

                                                            = 3.142 × 10 × 10/4

                                                            = 314.2/4

                                                            = 78.55cm²

The formula is written thus = πr²/4, which implies that the circle is divided into 4 unit

(d) The conjecture about how to determine the area of the sector is

Formula of a sector = ∅/360(πr²)

<u>Information</u>

The arc  cant be 60°, therefore information incomplete.

(e) Area of the sector with the angle AOB of 60° = 24.

To find the radius of the angle, make v the subject of the formula from the formula.

Sector area = πr²∅/360°

equate formula to 24.

Therefore πr²∅/360° = 24

Multiply through by360° to make it a linear expression

It now becomes πr²∅ =24× 360°

                                                     r² = 24  x 360/π × ∅°

                                                     r² = 24 × 360° /3.142 × 60°

                                                     r² = 3,640/188.52

                                                     r² = 45.8

To find r , we take the square root of both side by applying laws of indicies

                                    Therefore r = √45 .8

                                                      r = 6.77

(f)   General formula = ∅°/360° × (πr²)

angle substended at centre by the arc = x°

assuming the radius of the circle = ycm, Therefore,  area of the sector = { ∅°/360° × πy² }

                                                     

                                                   

8 0
3 years ago
A student answered 12 out of 15 questions on an exam correctly.
den301095 [7]

Answer:

1. 4/5

2. 80%

Step-by-step explanation:

6 0
3 years ago
Jenna painted l 1/8 of one side of a fence. Mark 3 one the other side of the same sex use greater equal or less to compare of th
ivanzaharov [21]

Answer:

?????

Step-by-step explanation:

7 0
2 years ago
If a bus traveled 160 miles in 4 hours, what was the average speed in miles per hour
sashaice [31]
160/4 = 40 mph so that would be the answer simply divide
5 0
2 years ago
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