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3 years ago

Round 3.047 to the nearest hundredth.

Mathematics

1 answer:

Phoenix [80]3 years ago

6 0

3.05 because it is tenth then hundredth after the decimal.

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Compute.

Sholpan [36]

<span>6 yr 7 months+ 2 yr 11 months = ?
6 yr + 2 yr = 8 yr

7 months + 11 months = 18 months = 1 yr 6 months

8 yr + </span>1 yr 6 months = 9 yr 6 months

answer is C<span>. 9 yr 6 months</span>

8 0

3 years ago

Please help me i will give biranlyest to who gets this done for me. thank you just do 2,3,4

morpeh [17]

Answer:

2: 6+4+6= 16

3: 6+6+9+9+18=48

4: 6+2+12+3+8= 36

I really hope this helped I’m not very Experienced in this.

6 0

3 years ago

Plss answer it please

ch4aika [34]

Answer:

Use Microsoft Math solver

4 0

4 years ago

A small metal bar, whose initial temperature was 10° C, is dropped into a large container of boiling water. How long will it tak

IgorC [24]

Answer

According to newton law of cooling

$\dfrac{d T}{dt} = k (T - T_a)$

and

$T = Ce^{kt} + T_a$

now At Ta = 100

T₀ = 10 °C

T₁ = 12° C

$T(0) = Ce^{0} + T_a$

10 = C + 100

C = -90

now,

$12 = -90e^k + 100$

$e^k = \dfrac{88}{90}$

$k = ln{\dfrac{88}{90}}$

at time equal to t

T(t) = 70

$T(t) = -90 (\dfrac{88}{90})^t + 100$

$70 = -90(\dfrac{88}{90})^t + 100$

$(\dfrac{88}{90})^t = \dfrac{1}{3}$

$t\times ln(\dfrac{88}{90}) = ln(\dfrac{1}{3})$

t = 48.88 s

hence, after 48.88 s the temperature of the body will be 70°C

b) time taken to reach 98°C

$T(t) = -90 (\dfrac{88}{90})^t + 100$

$98 = -90(\dfrac{88}{90})^t + 100$

$(\dfrac{88}{90})^t = \dfrac{1}{45}$

$t\times ln(\dfrac{88}{90}) = ln(\dfrac{1}{45})$

t = 390 s

hence, after 390 s the temperature of the body will be 98°C

5 0

3 years ago

A scientist runs an experiment involving a culture of bacteria. She notices that the mass of the bacteria in the culture increas

Genrish500 [490]

The growth factor for the mass of bacteria is 2.8 in 1 week.

Step-by-step explanation:

Step 1:

It is given that the bacteria in the culture increase by 260% per week. Now we assign values to get a better understanding. If there were 1,000 bacteria in the culture at the start of the week there would be 1,000 + 260% at the week's end = 1,000 + 2,600 = 3,600 at the week's end.

Step 2:

To calculate the growth factor, we calculate the difference between the present value and the past value and divide it by the past value.

Here the past value is 1,000 and the present value is 2,600.

Growth factor = $\frac{difference in values}{past value} = \frac{3,600-1,000}{1000} = \frac{2,600}{1,000} = 2.6.$

So the growth factor is 2.6 per week.

7 0

3 years ago