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The table shows the heights of 40 students in a class.
Height (h)
Frequency
in cm
120 <t< 124
7
124 < t < 128
8
128 <t< 132
13
132 <t< 136
9
136 <t<140
3
a) Calculate an estimate for the mean height of the students.
129.3 cm
b) Explain why your answer to part (a) is an estimate. I
+​

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

() at a farm, animals are fed bales of hay and buckets of gain.each bale of hay is in the shape of a rectangular prism.the base side lengths 2 feet and 3 feet,and the height is 5 feet. each bucket of grain is a cylinder with diameter of 3 feet. the height of the bucket is 5 feet as the height of bale. a. which is larger in area, the rectangular base of the bale or the circular base of the bucket? explain how you know b. which is larger in volume, the bale or the bucket? explain how you know

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1