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Cerrena [4.2K]
2 years ago
5

Giải hộ toi bài tập nó khá khó

Mathematics
1 answer:
deff fn [24]2 years ago
5 0

Answer:

hhhhhhhhhhhhhhhhhhhh

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Thorazine is available in a strength of 25 mg/mL. Express this strength as a percent.
wolverine [178]

Answer:

2.5%

Step-by-step explanation:

Thorazine is available in the strength of 25mg/mL.

To find out the percentage strength,

W/V = g/mL  (weight in grams of solute/milliliters of solute.)

1mL of Thorazine contains 25mg.

Dissolve Thorazine with the 100mL solution.

Therefore, 25 x 100 = 2500mg

Which is equals to 2.5g

100mL solution contains 2.5g of Thorazine.

Percentage Strength (W/V) = 2.5 / 100 x 100 = 2.5%.

The percentage strength of Thorazine 25mg/mL has 2.5%

5 0
3 years ago
Find the center and foci of the ellipse (x+5)/5+(y+9)/9=1
Katena32 [7]

(x+5)/5+(y+9)/9=1


The center is (-5,-9)

c^2 = 9-5 =4

c=2

foci =2

(-5,-7)  (-5,-11)

3 0
3 years ago
Suppose that 9 green balls and 14 purple balls are placed in an urn.  Two balls are then drawn in succession.  What is the proba
Hitman42 [59]
<span>14/23, or approximately 60.87% Since the first ball is replaced before the second is drawn, the two events are independent. And the probability of the second ball being purple is the percentage of the balls that are purple in the urn. The total number of balls is 9+14 = 23 and 14 of those balls are purple, so 14/23 = probability of the second ball drawn being purple. It's approximately 0.608695652, or 60.87%</span>
8 0
3 years ago
Find the total surface area of a cuboidal room whose
denpristay [2]

Answer:

174cm^2

Step-by-step explanation:

Given data

L=9m

W=5m

H=3m

The formula for the total surface area of a cuboid is

SA=2lw+2lh+2hw

substitute

SA=2*9*5+2*9*3+2*3*5

SA= 90+54+30

SA= 174cm^2

Hence the surface area is 174cm^2

8 0
3 years ago
HELP! The Question is "Select All Ordered pairs that satisfy the function y=4x + 3.​
PSYCHO15rus [73]

Answer: see explanation

Step-by-step explanation: To determine which ordered pairs satisfy the equation substitute the x coordinate of the point into the right side and if the value obtained equals the y coordinate of the point then it satisfies the equation

(- 1, - 1)

x = - 1 : y = - 4 + 3 = - 1 ⇒ (- 1, - 1) satisfies the equation

(2, 11)

x = 2 : y = 8 + 3 = 11 ⇒ (2, 11) satisfies the equation

(4, 7)

x = 4 : y = 16 + 3 = 19 ≠ 7 ⇒ (4, 7) does not satisfy the equation

(7, 1)

x = 7 : y = 28 + 3 = 31 ≠ 1 ⇒ (7, 1) does not satisfy the equation

7 0
3 years ago
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