Answer:
10cm
Step-by-step explanation:
the formula for an area of a trapezium:

where a and b are the parallel sides and h is the height. equating what we have:

simplify the numerator by adding 19.8 and 7.2=27

multiply both sides by 2

divide both sides by 27

the height is 10cm
Answer:
300 degrees
Step-by-step explanation:
we know that 

we have to find value of 
for that we have to multiply 5/6 to
and 360 degrees

Thus,
= 300 degrees.
U multiply 1 x 17 x 2
The answer is 34 cm3(cubed)
The 3 behind cm is an exponent
Answer:
Please see attachment for step by step guide and answer.
A=P(1/2)^(t/h)
P=initial amount
t=time
h=half life
A=final amount
so
A=0.242188 grams