2. read each problem and give your answer.
a. the average distance in kilometers (km) from the sun to the planet mercury is about 58,000,000 km. write this distance in scientific notation.
b. the diameter in centimeters (cm) of a human hair is about 0.0025 cm. write this diameter in scientific notation.

Tyler went to the supermarket to buy food for a food pantry. he has $36, and can carry up to 20 pounds of food in his backpack. pasta costs $1 for a 1-pound package. pasta sauce costs $3 for a 1.5 pound jar. let x = the number of packages of pasta and y = the number of jars of pasta sauce. one package of pasta is the right amount to go with one jar of pasta sauce. what is the best numbers of packages of pasta and jars of pasta sauce to buy for the food pantry? how many packages of pasta? how many jars of pasta sauce? explain your reasoning.