Mathematics, 26.08.2019 13:30 pk4mk
In an experiment, it is discovered that the temperature difference( in °c) between a glass of hot water and the room decreases by 4 % every minute. suppose that the original temperature of the glass of hot water is 100°c and the room temperature is 20 °c. let d °c be the temperature difference between the glass of hot water and the room after t minutes. (a) express d in terms of t. (b) find the temperature of the glass of hot water after 15 minutes, correct to the nearest °c. (c) (i) make t the subject of the equation in (a). (ii)find the time required for the temperature of the hot water to decrease to 30°c, correct to the nearest minute.
Answers: 3
Mathematics, 21.06.2019 14:40
Given the statements, "a square root of 16 is 4," and "a square root of 9 is -3," complete the following blanks with the correct truth-values. p is and q is , so the statement, "a square root of 16 is 4 or a square root of 9 is -3" is .
Answers: 3
Mathematics, 21.06.2019 20:00
Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,
Answers: 3
Mathematics, 21.06.2019 20:30
If m∠abc = 70°, what is m∠abd? justify your reasoning. using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°. using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°. using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality. using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.
Answers: 2
In an experiment, it is discovered that the temperature difference( in °c) between a glass of hot wa...
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