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3 years ago

A cylinder has a radius of 5 centimeters

Mathematics

1 answer:

zaharov [31]3 years ago

6 0

SA for a cylinder = 2 pie r squared + 2 pie r h

= 2 x pie x 25 + 2 x pie x 5 x 17

= 220 pie or 690.8 if you use 3.14 instead of the full value

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A culture started with 3,000 bacteria. After 8 hours, it grew to 3,300 bacteria. Predict how many bacteria will be present after

Sav [38]

Answer:

$3,462\ bacteria$

Step-by-step explanation:

In this problem we have a exponential function of the form

$y=a(b^x)$

where

x is the time in hours

y is the numbers of bacteria

a is the initial value

b is the base

r is the rate of growth

b=(1+r)

we have that

$a=3,000\ bacteria$

For x=8, y=3,300

substitute in the exponential function

$3,300=3,000(b^8)$

solve for b

$1.1=(b^8)$

$b=\sqrt[8]{1.1}$

$b=1.0120$

Find the value of r

$r=b-1=1.0120-1=0.0120=1.20\%$

The equation is equal to

$y=3,000(1.012^x)$

For x=12 hours

substitute the value of x in the equation

$y=3,000(1.012^{12})$

$y=3,462\ bacteria$

8 0

4 years ago

The diagram shows a right-angled triangle.

son4ous [18]

answer

11.3 cm

steps

what is h cm to angle 37°=it is an opposite side

what is 15 cm to angle 37°=it is an adjecent side

opposite and adjecent form a tan

.°. opp/adj = tan(37°)

h/15 = tan(37°)

h = 11.3 cm

6 0

3 years ago

What is a coterminal angle for 130 degrees that’s in between 0 and 360 degrees.

Ymorist [56]

Answer:

it's already a coterminal angle. the goal is too get the degree into that range of 0-360.

For example, the degree 450 would be 90.

450-360 = 90

So, 130 is your answer

8 0

4 years ago

(a - b)(2x-3)+(6x+7)(a+b) Factorise

Andreyy89

Answer:

2(4ax+2bx+2a+5b)

Step-by-step explanation:

5 0

2 years ago

A scientist invents a car that can travel for many hours without stopping for fuel. The car travels around a track at 51 miles a

EleoNora [17]

Well 51 per hour and there is 24 hours so you just multiply the two together. Which you would get get 1,224 Miles

4 0

3 years ago

Read 2 more answers