Subtract 4x from both sides: 5x - 5 = 10. Add 5: 5x = 15. Divide by 5: x = 3.

Applying lubricant reduces friction, making catheter insertion smoother and less painful.

The cell membrane consists of a phospholipid bilayer, which is two layers.

Product C sold 30 more units than Product A based on the data provided.

Coverage = 200 m² / 10 L = 20 m²/L. For 500 m², liters needed = 500 m² / 20 m²/L = 25 liters.

Work done = men * days. 12 men * 30 days = 360 man-days. To finish in 15 days, 360 man-days / 15 days = 24 men.

Cost per kg = $45 / 15 kg = $3. Therefore, 10 kg will cost 10 kg * $3 = $30.

Divide by 2: x + 3 = 8. Subtract 3: x = 5.

Let the number be x. Then, (2/5)x = 12. Solving gives x = 12 * (5/2) = 30.

Rate of production = 150 units / (3 machines * 5 hours) = 10 units/machine/hour. In 3 hours, 5 machines produce 5 * 10 * 3 = 150 units.

Let the number be x. Then, (3/4)x = 18. Solving gives x = 18 * (4/3) = 24.

Subtract 5 from both sides: 3x = 15. Then divide by 3: x = 5.

Add 4 to both sides: 3x = 15. Then divide by 3: x = 5.

81 = 3^4, so x = 4.

64 = 4^3, so x = 3.

Let the number be x. Then, 5x = 45. Therefore, x = 45/5 = 9.

If 5 workers take 10 days, then 10 workers will take 10/2 = 5 days.

5x = 23 - 3; 5x = 20; x = 20 ÷ 5 = 4.

Total work = 6 people * 12 days = 72 person-days. For 4 people, days = 72 person-days / 4 people = 18 days.

Subtract 2 from both sides: 6x = 18. Divide by 6: x = 3.

Calculating gives 2(2^2) + 3(3) = 2(4) + 9 = 8 + 9 = 17.

Distance = speed × time = 60 km/h × 3.5 h = 210 km.

Time = Distance / Speed = 240 km / 80 km/h = 3 hours.

After mitosis, each daughter cell will have the same number of chromosomes as the parent cell, which is 46.

The surface area to volume ratio is calculated as surface area divided by volume: 600/1000 = 0.6.

Probability that an animal does not survive = 0.1. For 10 animals: (0.1)^10 = 0.00000001. So, 1 - 0.00000001 = 0.99999999.

The population doubles every 3 hours. In 12 hours, there are 12/3 = 4 doublings. Therefore, the population will be 100 * 2^4 = 100 * 16 = 1600.

Size after 2 weeks = 100 * (1.5)^2 = 100 * 2.25 = 225 grams.

Decrease = 200 - 50 = 150. Percentage decrease = (150 / 200) * 100 = 75%.

In 1 year, there are 3 reproduction cycles (0, 4, 8 months). Total offspring = 100 * 3 = 300.