In a study investigating the effect of car speed on accident severity, 5000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. for these 5000 accidents, the average speed was 41 mph and that the standard deviation was 12 mph. a histogram revealed that the vehicle speed at impact distribution was approximately normal. (a) roughly what proportion of vehicle speeds were between 29 and 53 mph? (round the answer to the nearest whole number.) (b) roughly what proportion of vehicle speeds exceeded 53 mph? (round the answer to the nearest whole number.)

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

What is 140% of 25? because i need

Ican interpret and represent the remainder in division calculations sensibly for the context (eg if we wont to know how many 40 seat buses will be needed to transport 170 students for on excursion, we divide 170 by 40 and realise buses and another smaller vehicle to that we need 4 transport 10 more students) solve the following questions. show your work! 11) the zoo had 420 butterflies that needed to be transported to a new enclosure. the boxes that the butterflies would be moved in only hold 80 butterflies in each. how many boxes would they need? 2 12) each classroom in the school can have exactly 25 students, if there are 345 students in the school how many full classrooms are there?