Acar is moving on the distance 35km in the time 30minutes, stays 20 minutes, the it moves again vith the velocite 60km/h in 25 minutes: a)the first velocity on the first part of the road b)the distance driven on the last part of the road c)the average velocity in meters/seconds

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

Ineed the answer to question 1 , i’m desperate