Pick one and answer please (u only have to answer one)

Mathematics

2 answers:

kakasveta [241]2 years ago

7 0

Answer:

Definition: Scaled Drawing. A drawing that shows a real object with accurate sizes reduced or enlarged by a certain amount

Example

Example #1:

Suppose a problem tells you that the length of a vehicle is drawn to scale. The scale of the drawing is 1:20.

If the length of the drawing of the vehicle on paper is 12 inches, how long is the vehicle in real life?

Set up a proportion that will look like the formula above picture

A scale drawing proportion

Do a cross product by multiplying the numerator of one fraction by the denominator of the other fraction

We get :

Length of drawing × 20 = Real length × 1

Since length of drawing = 12, we get:

12 × 20 = Real length × 1

240 inches = Real length

The real length of the vehicle is 240 inches.

2)Circumference of circle: The distance around the circular region is called its circumference. The ratio of circumference of any circle to its diameter is constant. ... Area of circle: The measure of the region enclosed inside the circle is called its area.

Marizza181 [45]2 years ago

3 0

Answer:

A drawing that shows a real object with accurate sizes reduced

Step-by-step explanation:

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The number of hours, t, that bacteria spread 10-fold can be modeled by the equation B(t) = B0(10)2t. There are 25 bacteria prese

nordsb [41]

Answer: 1.67 hours.

Explanation:

1) Function that models the number of bacteria:

$B(t)=B_0(10)^{2t}$

2) Bo = 25, then the function is:

$B_0=25(10)^{2t}$

3) To know how many hours will elpase until the number of bactaria is 55,00, you equals B to 55,500 in the equation and solve for t, in this way:

i) start

$55000=25(10)^{2t)$

ii) division property

$2200=10^{2t}$

iii) antilogarithm property

$2t = log_{10}2200$

iv) division property

$t=\frac{log_{10}2200}{2}$

v) Due the operations:

t = 1.67 hours.

Note that the time is less than 2 hours. That sounds fine since after 1 hour there will be 10 times 25 (250 bacteria), and after 2 hours 100 times 25 (2500 bacteria).