A scientist is testing a new antibiotic on some bacteria she discovers the the antibiotic kills half of the Bactria every hour if she starts with 42000 bacteria what equation can be used to predict the number of bacteria after x hours
a). y= 42000(2)^x
b). y=42000(1/2)^x
c). y=42000(1.5)^x
d). y=(42000/2)^x

Answer:

132

Step-by-step explanation:

because area is when you multiply 2 numbers and if you multiply 12 and 11 you will get 132 u welcome

Answer:

126 m^2

Step-by-step explanation:

We can use the formula of the area of a parallelogram:

Hope this helps!!

Answer:126m^2

Step-by-step explanation:

The area of a parallelogram is the same as a rectangle. You must do 9*14=126.

Answer:

C) 2

Step-by-step explanation:

The points from the second line are 2 times the amount of the coordinates of the first line

Answer:

tan y°

Step-by-step explanation:

by using the Sine Rule (See attached), we can form the equation:

[tex]\frac{r}{sin (y)} = \frac{p}{sin (x)}[/tex]

rearranging this, we get:

[tex]\frac{r}{p} =\frac{sin(y)}{sin(x)}[/tex]   ---------------------eq 1

Recall that all internal angles of a triangle must sum to 180°. we observe that we have a right triangle where one of the angles is 90°. It then follows that the sum of the other two angles must sum to 90°

i.e x + y = 90°

with a little rearranging, we get

x = (90° - y)

Substituting this into eq 1 above, we get:

[tex]\frac{r}{p} =\frac{sin(y)}{sin(90- y)}[/tex]  ---------eq 2

recall that from the trigonometric co-function identities,

sin (90°- y) = cos y

substituting this into eq 2 gives :

[tex]\frac{r}{p} =\frac{sin(y)}{cos(y)} = tan(y)[/tex]   (answer)

Answer:

1 11/24

Step-by-step explanation:

30/48+40/48=70/48=1 11/24

Answer:

15/24 + 20/24 = 35/24 = 1 11/24

Step-by-step explanation:

because 6 and 8 lcm = 24 soooo

5x4 + 5x3 = 20 + 15 = 20/24 + 15/24

which is 35/24 which equals 1 11/24

hope it helps :>

Answer:

mary owes tom $8

Step-by-step explanation:

Answer: 60 miles

Step-by-step explanation:

On a map, Indy and Fort Wayne are 19 centimeter apart while Kokomo and Indy are 9.5 cm apart on the map.

In real life, Indy and Fort Wayne are actually 120 miles apart, the distance between Indy and Kokomo in real life would then be:

= 9.5 × 120/19

= 120/2

= 60 miles

Indy and Kokomo are 60 miles apart in real life.

Answer:

77

Step-by-step explanation:

180-103=77

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Answer:

saturday

Step-by-step explanation:

monday:

17.88 (price) divided by 6 (number of bottles) is equal to 2.98 (unit price per bottle)

saturday:

9.33 (price) divided by 3 (number of bottles) is equal to 3.11 (unit price per bottle)

Please let me know if my answer is right! Thanks!

Answer:

13.42

Step-by-step explanation:

Answer:

.27 or 27/100

Step-by-step explanation:

each tenth is equal to 10 one hundredths

Answer:

90

Step-by-step explanation:

on multiplication.

Answer:

6x^8 hope this helps

Step-by-step explanation:

Answer:

S=20

Step-by-step explanation:

we want P(s) = 60

so P(s) = 3s = 60

s = 20

Answer:

A. (3,2) . I recommend using desmos to find the coordinates

9514 1404 393

Answer:

  A.  (3, 2)

Step-by-step explanation:

The midpoints of the diagonals are the same point, so you have ...

  X = (A +C)/2 = (B +D)/2

  A +C = B +D . . . . . . . multiply by 2

  A +C -B = D . . . . . . . subtract B

The coordinates of D are ...

  D = (3, 6) +(6, 3) -(6, 7) = (3+6-6, 6+3-7)

  D = (3, 2)

Answer:

YES

Step-by-step explanation:

2x-y=5

2(2)-(-1)=5

4-(-1)=5

4+1=5

5=5

Answer:

first replece x and y , 2(2)-(-1)=5

4 +1=5 correct

Step-by-step explanation:

Step-by-step explanation:

If the interest on the loan is simple interest. Both the situation will have equal amount of interest ( 5*2 =10% of total amount). Therefore, it would be better to pay back with 2% interest paid back in five years. However, if the interest is compounded annually, 5% in 2 years will have lesser interest than 2% in 5 years. Hence, Former option would be better.

Answer:

Square

Step-by-step explanation:

CHECK THE ATTACHMENT FOR THE FIQURE OF THE QUESTION

✓We were given the dimension of the rectangular prism as 10cm × 4cm × 4cm,

✓The cross section of the paperweight can be cut into half to it's base. Then the new dimension will be 4cm × 4cm which is a quadrilateral.

✓ Then width= 4cm, and height=4 cm are of the same values, hence the shape it forms is a SQUARE. and also the their angles is 90° each.

Answer:

5027 square centimeters (cm2)

Step-by-step explanation:

Answer:

800π or 2513.3

Step-by-step explanation:

A = πr²/2

A = 1600π/2 or 800π

Answer:

[tex] \sqrt{} \frac{1}{49} = \frac{1}{7} [/tex]

Answer:

a) A -> 7.51

b) C -> 1.21

Step-by-step explanation:

First, you compare the units digits of the nos., then you compare the tenths place digits, then the hundreths place digits, and so on.

a) A -> 7.51

b) C -> 1.21

Hope it helps :)

Please mark my answer as the brainliest

Answer:

3(3x-1)(3x+1)

Step-by-step explanation:

27x²-3

You can factor out a 3

3(9x²-1)

Now we can use the difference of perfect squares formula

x²-y²=(x+y)(x-y) which means that 9x²-1=

(3x-1)(3x+1)

put it all together and get

3(3x-1)(3x+1)

Answer:

Pack of 6

Step-by-step explanation:

Pack of 4 = £1

Packs of 6 = £1.20

Price per unit of each pack:

Pack of 4 ;

Unit price : cost / units

Unit price = £1 / 4 = £0.25

Pack of 6 ;

Unit price : cost / units

Unit price = £1.20 / 6 = £0.20

Pack of 6 is the best value for money as it has a lower unit price

Answer:

14x+6

Step-by-step explanation:

Multiply 7x by 2 which gets you 14x and multiply 3 by 2 which is 6.

Answer:

Answer: Yes , priya calculated correctly . The value of 40% of 75 is 30

Step-by-step explanation:

the answer is totally numbers

Answer:

$13.75 as the tip

Step-by-step explanation:

25% of 55$ = $13.75