When Ron cycles, his maximum speed is 20 km/h when ron runs, his maximum is 7 m/s .

which is greater. When he is running or cycling?

AND

Ron wants to buy 30 tubes of crips

shop A sells

3.99 a tube
buy 2 get 1 free

shop 2

3.99 a tube
20% off

which shop will he pay the least amount of money?

What is this inequality notation? t is less then or equal to 2

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

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.