A man's regular pay is $3 per hour up to 40 hours. Overtime is twice the payment for regular time. If he was paid $168, how many hours overtime did he work?

None of these solutions in water conducts electricity EXCEPT for:

Photosynthesis is important because:

Tooth decay can be caused by:

This question refers to the triangle PQR in which angle QPR = 90°, PR = 12 cm and PQ = 5 cm.

The length of QR, in cm, is

Why is testing a leaf for starch a reliable indication that photosynthesis has taken place?

Transpiration is:

Which of the following tests describes the test for glucose?

The wall of the heart is made of:

To electrolyse solid lead bromide it must first be heated so that:

Which of the following nutrients is/are digested in the stomach?

The speed of a dot-matrix printer is measured by the number of __________ that it can print.

In an atom the neutron is found:

When testing a leaf for the presence of starch, the correct sequence of procedures is:

Which one of the following statements about an ammeter is NOT true?

Which of the following devices are MOST LIKELY to be used at an airport for border control activities?

Crossing two brown mice produced an offspring with a black coat.Which of the following statements MUST be correct?
Ⅰ Brown coat is dominant to black.
Ⅱ The brown mice were heterozygous for coat colour.
Ⅲ The black mouse was homozygous for coat colour.
Ⅳ Crossing a black mouse with another black mouse could produce a brown offspring.

Which one of the following statements about a voltmeter is NOT true?

Instructions: Choose from the four suggested answers the word which is closest to OPPOSITE in meaning to the underlined word.

The headgear worn by the factory worker is made from artificial material.

A man bought a shirt at a sale. He saves $30 on the normal price when he paid $120 for the shirt. What was the percentage discount on the shirt?