Question
1. How many bricks each measuring 25cm×11.25cm×6cm, will be needed to build a wall of 8m×6m×22.5? 2. what decimal of an hour is a second? 3. without a calculator, 0.04×0.0162 is equal to...... 3. (0.04)^ -1.5 4. if m and n are whole numbers such that m^n=121, the value of (m-1)^n+1 is
Answers
#1
800*600*2250
----------------- = 640,000
25*11.25*6
1s = 1/3600 hr = 0.0002777777...
4*162 = 648, so
.04*.0162 = 648/(100*10000) = .000648
.2 = .04^0.5, so
.2^3 = .008 = .04^1.5
1/.008 = 125 = .04^-1.5
11^2 = 121, so 10^3 = 1000
800*600*2250
----------------- = 640,000
25*11.25*6
1s = 1/3600 hr = 0.0002777777...
4*162 = 648, so
.04*.0162 = 648/(100*10000) = .000648
.2 = .04^0.5, so
.2^3 = .008 = .04^1.5
1/.008 = 125 = .04^-1.5
11^2 = 121, so 10^3 = 1000