Explanation

Explanation

(X/100) × (25/2) = 150

To get rid of the fraction, multiply both sides by 2:

(X/100) × 25 = 300

Now, divide both sides by 25:

X/100 = 300/25

X/100 = 12

Multiply both sides by 100 to solve for X:

X = 1200

Explanation

Hydrogen is the lightest element, and its most common isotope (protium) has no neutrons in its atomic nucleus.

The atomic number of hydrogen is 1, which means it has one proton in its nucleus, but no neutrons.

The three main isotopes of hydrogen:

• Protium (1H): 1 proton, 0 neutrons
• Deuterium (2H or D): 1 proton, 1 neutron
• Tritium (3H or T): 1 proton, 2 neutrons

Explanation

Saturated hydrocarbons are called alkanes.

Alkanes are a type of hydrocarbon that have only single bonds between the carbon atoms, and are "saturated" with hydrogen atoms.

They have the general formula CnH2n+2 and are also known as paraffins.

Examples of alkanes include methane (CH4), ethane (C2H6), and propane (C3H8).

Explanation

CRT (Cathode Ray Tube) is a type of output device.

It displays visual information on a screen.

Such as in old computer monitors and televisions.

Explanation

The question tag must match the auxiliary verb "should" in the main sentence.

"Shouldn't we?" is the appropriate response for agreement with "we should."

Explanation

On MS Word, the keyboard shortcut Ctrl+U is used to apply an underline to the selected text,

This is an alternative to clicking the underline icon (U) in the toolbar or ribbon.

Explanation

The Insert tab in MS Excel contains the options to add charts, including:

• Bar charts
• Line charts
• Pie charts

You can find the "Charts" group to create and customize visual data representations under this tab.

Explanation

The phrase "as old as the hills" means something is very old or ancient.

It emphasizes great age, often used to describe traditions, objects, or ideas that have existed for a long time.

Explanation

The dog sprang upon him.

"Upon" indicates the action of the dog jumping or leaping toward the person.

It often suggesting an energetic or sudden movement.