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Aleksandr-060686 [28]
4 years ago
11

Please can you work it out quickly thanks

Mathematics
1 answer:
PolarNik [594]4 years ago
5 0

the answer for the first one is 15

Step-by-step explanation:

the length of the rectangle is 18 and there are 6 squares in the horizontal lines so the length of each square is 18÷6=3.

there are 5 squares in the vertical line so the width is 3*5=15

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if the height and radius of cylinder are 35cm and 14cm respectively then fund its curved surface area​
lbvjy [14]
<h2><em><u>Answer</u></em><em><u>:</u></em></h2>

<h3><em><u>total surface area=2π(14×14)+2π14×35</u></em></h3><h3><em><u>total surface area=2π(14×14)+2π14×35 =4308.08 sq. cm</u></em></h3><h3><em><u>total surface area=2π(14×14)+2π14×35 =4308.08 sq. cmcurved surface area=3077.2 sq.cm</u></em></h3><h3><em><u>total surface area=2π(14×14)+2π14×35 =4308.08 sq. cmcurved surface area=3077.2 sq.cmtherefore ratio=1.5:1=3:2</u></em><em><u> </u></em><em><u>(ans)</u></em></h3>

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7 0
3 years ago
Read 2 more answers
Divide 49 ÷ 8 = and show your work
hichkok12 [17]

Answer:

6

Step-by-step explanation:

Place this digit in the quotient on top of the division symbol. Multiply the newest quotient digit (6) by the divisor 8 . Subtract 48 from 48 . The result of division of 48÷8 48 ÷ 8 is 6

6 0
3 years ago
Read 2 more answers
Can you start a science test at 2:34 PM and finish the test 35 minutes later Kevin has football practice at 4:15 PM how much tim
Likurg_2 [28]

Answer:

1 hour 6 minutes = 66 minutes.

Step-by-step explanation:

Starting the test at 2:34 pm,

Finishes the test 35 mins later, time = 2:34 pm + 35 mins = 3:09 pm

Then Kevin starts his practice at 4:15 pm

Time between time the test ended and when the practice started

= 4:15 pm - 3:09 pm = 1 hour 6 minutes = 66 minutes.

Hope this Helps!!!

7 0
3 years ago
(1 point) Carbon dating is often used to determine the age of a fossil. For example, a humanoid skull was found in a cave in Sou
Aleksandr [31]

Answer:

The estimated age of the skull is 39118 years.

Step-by-step explanation:

The amount of the substance after t years is given by:

A(t) = A(0)(1-r)^t

In which A(0) is the initial amount, and r is the decay rate.

The half-life of carbon-14 is about 5600 years.

This means that A(5600) = 0.5A(0). We use this to find r, or 1 - r, to replace in the equation. So

A(t) = A(0)(1-r)^t

0.5A(0) = A(0)(1-r)^{5600}

(1-r)^{5600} = 0.5

\sqrt[5600]{(1-r)^{5600}} = \sqrt[5600]{0.5}

1 - r = (0.5)^{\frac{1}{5600}}

1 - r = 0.9999

So

A(t) = A(0)(0.9999)^t

Only 2% of the original amount of carbon-14 remains in the burnt wood of the campfire.

This is t for which A(t) = 0.02A(0). So

A(t) = A(0)(0.9999)^t

0.02A(0) = A(0)(0.9999)^t

(0.9999)^t = 0.02

\log{(0.9999)^t} = \log{0.02}

t\log{0.9999} = \log{0.02}

t = \frac{\log{0.02}}{\log{0.9999}}

t = 39118

The estimated age of the skull is 39118 years.

6 0
3 years ago
If a population consists of 1,000,000 people and a census is taken, how many people are sampled
Artist 52 [7]

Answer:

1,000,000

Step-by-step explanation:

3 0
3 years ago
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