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Evgen [1.6K]
3 years ago
5

A group of scientist study the effect of chemical on Various strains of bacteria. Strain A started with 12000 cells and decrease

s at a constant rate of 4000 cells per hour after the chemical was applied. strain B started with 6000 cells and decreased at a constant rate of 3000 cells per hour after the chemical was applied. when will just strains have the same number of cells? explain
Mathematics
1 answer:
strojnjashka [21]3 years ago
3 0
Apos 3 horas de tratamento a estirpe "A" já deve ter sido combatida com total eficácia, enquanto que a estirpe "B" deve levar cerca de 2 horas para chegar ao mesmo resultado!
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4) Solve ∆ABC, a = 2.5 cm, c = 3.6 cm, and ∠A = 43°. Begin by sketching and labelling
mezya [45]

The length of b and angle B and C are 3cm, 45  degrees and 79 degrees respectively.

<h3>How to determine the parameters</h3>

To determine the angles and length of sides, we use the sine rule

The sine rule is thus:

\frac{sin A}{a} = \frac{sin B}{b} = \frac{sin C}{c}

Given;

  • a = 2. 5cm
  • c = 3. 6cm
  • ∠A = 43°

Let's find angle C

\frac{sin 43}{2. 5} = \frac{sin C}{3. 6}

cross multiply

0. 682 × 3. 6 = sin C × 2. 5

sin C = 2. 4552/ 2. 5

C = sin^-^1(0. 982)

C = 79°

To find length of b

b= \sqrt{c^2 - a^2}

substitute the values

b = \sqrt{3.6^2 - 2. 5^2}

b = \sqrt{6. 71}

b = 2. 59 cm

b = 3cm

To find angle B, we have

\frac{sin 43}{2. 5} = \frac{sin B}{2. 59}

cross multiply

0. 682 × 2. 59= sin B × 2. 5

sin B = 0. 7065

B = sin^-^1(0. 7065)

B = 45°

Hence, the length of b and angle B and C are 3cm, 45  degrees and 79 degrees respectively.

Learn more about sine rule here:

brainly.com/question/12827625

#SPJ1

8 0
1 year ago
Chelsea is having a game night at her house this Friday. She has a budget of $26. She buys two pizzas for $18 and spends the rem
Alinara [238K]

Answer:

4

Step-by-step explanation:

you'd do 26-18 which will give the leftover money after paying for the two pizzas which equal 8

each soda costs 2 dollars so you would do 8 divided by 2 which is 4

7 0
2 years ago
Lily sees 15 tan puppies and 8 white puppies at the pet store how many more tan puppies does she see
IgorLugansk [536]
She sees 7 more than puppies (15 - 8 = 7)
3 0
2 years ago
What is the gcf of 3x^2 and 7y
Svetach [21]
Answer :
<span>Unless we have a relationship defined between x and y there is no common factor apart from 1.
</span>
hope it helps 
~Reema
7 0
3 years ago
Solve 5 + 44 = 2 + r
pickupchik [31]
Okay the answer is r=47
Let's solve your equation step-by-step.<span>5+44=2+r
</span>Step 1: Simplify both sides of the equation.<span>5+44=2+r
</span>Simplify:<span>49=r+2
</span>Step 2: Flip the equation.<span>r+2=49
</span>Step 3: Subtract 2 from both sides.<span><span>r+2−2</span>=49−2</span>r=47
Answer:<span>r=<span>47
Hope this helps!:)</span></span>
6 0
2 years ago
Read 2 more answers
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