3 years ago

HELPPPPPPPPPP HELPPPPPP

Mathematics

2 answers:

kifflom [539]3 years ago

4 0

Answer:

14c decrease Option D

Step-by-step explanation:

The temperature was 8c at 12 am and -7c at 7 pm to find the difference subtract to get 14c.

snow_tiger [21]3 years ago

4 0

whats wrong im only in 7th grade

Step-by-step explanation:

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Plz help me its confusing

IgorC [24]

Answer:

Step-by-step explanation:

8 0

3 years ago

In a lab, a scientist is growing bacteria for a study. The scientist begins with a bacteria

Diano4ka-milaya [45]

Answer:

The answer is below

Step-by-step explanation:

The growth of the bacteria is in the form of an exponential growth. It is given by the formula:

$P(t)=ae^{rt}\\\\where\ t\ is\ the\ number\ of \ hours, P(t)\ is\ the \ population\ at\ t\ hours\\\and\ a=population\ at\ start$

At 2 hours, the population is 62 cells, hence:

$P(2)=ae^{2r}\\\\62=ae^{2r}\ \ .\ \ .\ \ .\ (1)$

After another 2 hours (4 hours), the population is 1 million:

$P(4)=ae^{4r}\\\\1000000=ae^{4r}\ \ .\ \ .\ \ .\ (2)\\\\Divide \ equation\ 2\ by\ equation\ 1:\\\\\frac{1000000}{62}=\frac{ae^{4r}}{ae^{2r}} \\\\16129=e^{2r}\\\\ln(e^{2r})=ln(16129)\\\\2r=9.688\\\\r=4.844$

Put r = 4.844 in equation 1

$62=ae^{2*4.844}\\\\62=16129a\\\\a=0.003844$

$P(t)=0.003844e^{4.844t}\\\\at \ start,t=0\\\\P(0)=0.003844$

4 0

3 years ago

Given the right triangle, write the following trig ratios for cosecant, secant and cotangent. (20 points)

snow_tiger [21]

Okay uhhh wait m figuring it out

7 0

3 years ago

The length of CD¯¯¯¯¯ is 9 units.

sergejj [24]

13.5 units long after dilation.

3 0

3 years ago

After joining two pieces of a picture frame together, a frame maker checks her work by measuring the diagonal (see the illustrat

tigry1 [53]

The diagonal (hypotenuse) is 13 in.

You need to use the Pythagorean Theorem

${a}^{2} + {b}^{2} = {c}^{2}$
then just plug in the numbers and solve for c.

${12}^{2} + {5}^{2} = {c}^{2}$
$\sqrt{169} = c$
13 = c

6 0

3 years ago