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3 years ago

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Mathematics

1 answer:

Sergeu [11.5K]3 years ago

5 0

Answer:

Step-by-step explanation:

What do you have to do solve it or what

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Please help and please say the formula!!

Damm [24]

Answer:

Step-by-step explanation:

Formula: 4*((15*7)/2) + 15^2

This is the area of the four triangles combined (210 cm^2) plus the area of the square (225 cm^2)

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3 years ago

Is the discriminant of f positive, zero, or negative?

jarptica [38.1K]

Answer:

Negative

Step-by-step explanation:

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3 years ago

A thermometer is taken from a room where the temperature is 20°C to the outdoors, where the temperature is 3°C. After one minute

IrinaVladis [17]

Answer:

A. T=7.12°C; B. t=3.32min

Step-by-step explanation:

In order to find the answer we can use the Newton's law of cooling:

$y(t)=y0e^{kt}$ where:

y0=initial temperature - room temperature

k=coefficients

t=time

Because the outdoors temperature is 3°C, the initial temperature is 20°C, and because the thermometer reads 11°C after 1min we have:

$11=(20-3)e^{k*1}$

$ln(11/17)=k$

$-0.4353=k$

A. Temperature after an extra minute.

$y(2)=17e^{-0.4353*2}$

$y(2)=7.12$ so the answer is 7.12°C

B. Time in order to read 4°C

$4=17e^{-0.4353*t}$

$ln(4/17)/(-0.4353)=t}$

$3.32min=t$

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3 years ago

What iş the best prediction of the percentage of the baby rhinoceros body mass used to determine the amount of food given at eac

Marta_Voda [28]

The answer to the question is 6%

3 0

3 years ago

Read 2 more answers

If $10,000 is invested at an annual rate of 11%, compounded quarterly, find the value of the investment after the given number o

lana [24]

Answer:

$a) A\simeq17204.28$

$b) A\simeq29598.74$

$c)A\simeq50922.51$

Step-by-step explanation:

The amount formula in compound interest is:

$A=P(1+\frac{r}{n} )^{nt}$

where:

P = principal amount

r = annual interest

n = number of compounding periods

t = number of years

We already know that:

P = $10000

$r = 11\% = \frac{11\%}{100\%}=0.11$

n = 4 (quarterly in a year)

a ) t = 5 years

$A=10000(1+\frac{0.11}{4} )^{(4)(5)}\\\\A=10000(1+\frac{0.11}{4} )^{20}\\\\A=17204.28431\\\\A\simeq17204.28$

b) t = 10 years

$A=10000(1+\frac{0.11}{4} )^{(4)(10)}\\\\A=10000(1+\frac{0.11}{4} )^{40}\\\\A=29598.73987\\\\A\simeq29598.74$

c) t = 15 years

$A=10000(1+\frac{0.11}{4} )^{(4)(15)}\\\\A=10000(1+\frac{0.11}{4} )^{60}\\\\A=50922.51361\\\\A\simeq50922.51$

5 0

3 years ago

Read 2 more answers