Alex draws the scale model shown as a plan for a large wall mosaic. 10 cm 12 cm

a. The wall is 10 m wide and 7 m high. What are the dimensions of the largest mosaic he can make on that wall? Explain.

b. He will use 2-cm square tiles to make his mosaic. How many tiles will he need? Explain how you found your answer.

Please help and answer. Thank you.

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?

What is the volume of this container?

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.