Achieved points of students 6.a in the mathematics exam (total 50 points) are:28,34,42,36,48,18,31,39,47,49,3 5,22,30,46,41,29,36. For a grade sufficient it is necessary to have 45% of the total points, for a very good 80%, and for an excellent 90% of the total number of points.​

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)

6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?

Awavelength of 610 nm was found to be the most intense wavelength emitted by copper. answer the following questions about this wavelength of light. a) what is this wavelength in cm? b) what is the frequency that corresponds to this wavelength? c) what is the energy of light of this wavelength? d) what is the wavenumber corresponding to this wavelength?