Explanation

The surface area of a sphere is given by the formula: 4πr².

Substituting r = 7 cm, we get 4 × 3.1416 × (7)² = 616 cm².

Explanation

Since fluorine is more electronegative, its oxidation state is -1.

The molecule OF2 has zero overall charge:

O + 2F = 0

x + 2(-1) = 0

x - 2 = 0

x = +2

Explanation

• In the human heart, blood returning from the lungs via the pulmonary veins drains into the left atrium.
• From there, it flows through the mitral valve into the left ventricle, which pumps it out to the rest of the body through the aorta.

Explanation

Given log₁₂(12³) = x:

Using logarithm properties, logₐ(aⁿ) = n:

x = 3

Explanation

When a coin is flipped, there are two possible outcomes: heads (H) or tails (T).

The probability of getting a head is the number of favorable outcomes (getting a head) divided by the total number of possible outcomes:

Probability = Number of favorable outcomes / Total number of possible outcomes

= 1 (head) / 2 (head or tail)

= 1/2

Explanation

An anagram is formed by rearranging the letters of a word to form a new word.

"Silent" is an anagram of "Listen" as it uses the exact same letters in a different order.

Explanation

Vertical angles are equal, so set up an equation:

80° = 4x

Divide both sides by 4:

x = 80° / 4

x = 20°

Explanation

Explanation

Alliteration is the repetition of the same consonant sound at the beginning of closely connected words.

In this sentence, the ‘s’ sound is repeated in “she,” “sells,” “seashells,” and “seashore.”

Explanation

Indigenous means سودیشی

Native means مقامی