So i can only get 3/5 marks on this question so can someone show me which lines of working out i might be missing
question:
a rectangular floor tile is shown :
height = 1.6m
width = 2.3m
its dimensions are given to the nearest 0.1 meters
the tile is only able to sustain a maximum pressure of 200 newtons per square meter (n/m^2) correct to he nearest 5 (n/m^2)
given that pressure = force /area
work out the maximum force , in newtons , that can safely be applied to the tile
my working out so far:
area
1.65 × 2.35 = 3.88
1.55 × 2.25 = 3.49
pressure
upper bound = 202.5
lower bound = 197.5

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.

answer: h

step-by-step explanation:

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.

care to share were the trapezoid shown is ?