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3 years ago

15

The label on a bottle of film developer states that the temperature, t, of the contents must be kept between 68° and 77° Fahrenh

eit.

2 answers:

pantera1 [17]3 years ago

6 0

What’s the question

skad [1K]3 years ago

5 0

OK, so is this a question?

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Suppose the half-life of a material is 10 days. You have one 1 kg of the material today. How much of the material would you have

boyakko [2]

Answer:

0.50 kg of the material would be left after 10 days.

0.25 kg of the material would be left after 20 days.

Step-by-step explanation:

We have been given that the half-life of a material is 10 days. You have one 1 kg of the material today. We are asked to find the amount of material left after 10 days and 20 days, respectively.

We will use half life formula.

$A=a\cdot(\frac{1}{2})^{\frac{t}{h}}$ , where,

A = Amount left after t units of time,

a = Initial amount,

t = Time,

h = Half-life.

$A=1\text{ kg}\cdot(\frac{1}{2})^{\frac{10}{10}}$

$A=1\text{ kg}\cdot(\frac{1}{2})^{1}$

$A=1\text{ kg}\cdot\frac{1}{2}$

$A=0.5\text{ kg}$

Therefore, amount of the material left after 10 days would be 0.5 kg.

$A=1\text{ kg}\cdot(\frac{1}{2})^{\frac{20}{10}}$

$A=1\text{ kg}\cdot(\frac{1}{2})^{2}$

$A=1\text{ kg}\cdot\frac{1^2}{2^2}$

$A=1\text{ kg}\cdot\frac{1}{4}$

$A=0.25\text{ kg}$

Therefore, amount of the material left after 20 days would be 0.25 kg.

6 0

3 years ago

How far is the director if he hears the drumbeat in 0.40 seconds? The speed of sound is 330 m/s

Tomtit [17]

825 meters away
i think bit too sure

7 0

3 years ago

What value of n make this equation true 12(n+6)=96

exis [7]

Answer:

2

Step-by-step explanation:

(6+2)x 12 =96

5 0

2 years ago

Read 2 more answers

Please help me out with my maths I would really appreciate it

garik1379 [7]

Answer:

a.

1. The rule in this sequence is (+5) every next pattern

2. 22, 27, 32, 37

3. 42

4. 12 term

5. 67

b.

1. The rule in this sequence is (-3) every next pattern

2. -7, -10, -13, -16

3. -16

4. 13 term

5. -37

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Riley paid $2.99 for a 20-ounce container of soup. at that rate, what would riley pay for a 12-ounce container of the same soup?

love history [14]

$2.99/20 will be the unit price of soup. Then the amount Riley has to pay for 12 ounce would be 12*2.99/20=$1.794

8 0

2 years ago