1/4 + 1/4 = 1/2

10 - 4 = 6

12 ÷ 3 = 4

15 - 9 = 6

20 ÷ 4 = 5

3 × 3 = 9

3.14 * 2 = 6.28

5 + 3 = 8

6 × 2 = 12

Defibrillation is used to restore normal heart rhythm in cases of life-threatening arrhythmias.

The absolute value of -8.5 is 8.5.

Circumference = 2πr, r = 31.4/(2π) ≈ 5 m. Area = π(5)² = 25π ≈ 78.5 m².

Area = πr² = π(10)² = 100π ≈ 314 cm².

Area = πr² = π(7)² = 49π ≈ 154 cm².

Area = base × height = 12 × 7 = 84 cm².

Area = 1/2 * (base1 + base2) * height = 1/2 * (5 + 7) * 4 = 24.

A gene is the basic unit of heredity, responsible for the transmission of traits from parents to offspring.

Circumference = 2πr = 2 * (22/7) * 7 = 44 cm.

pOH = 14 - pH = 3, [OH-] = 10^-3 M.

Area = πr²; 50.24 = 3.14 * r²; r² = 50.24 / 3.14 = 16; r = 4 cm; Diameter = 8 cm.

Distance = |3(1) + 4(2) - 10| / √(3² + 4²) = |3 + 8 - 10| / 5 = 1/5 = 0.2.

The effect is called the Lorentz force when a current-carrying conductor is placed in a magnetic field.

Adding a strong acid decreases the pH of the buffer solution.

An electrical shock can disrupt the normal rhythm of the heart, potentially causing arrhythmias.

Lead exposure can lead to hearing loss, particularly in children, and can also affect cognitive development.

Equation of circle: (x-h)² + (y-k)² = r² => (x-2)² + (y+3)² = 4² = 16.

Area = 1/2 * base * height; 32 = 1/2 * 8 * height; height = 32 / 4 = 8 cm.

Plastic pollution poses a significant threat to marine life through ingestion and entanglement, leading to injury and death.

sin⁻¹(1/2) = 30°

The compound CH3-CH2-COOH is propanoic acid, as it has three carbon atoms.