Total number of guests = 16
Solution:
Number of pizzas the caterer usually makes = 4
Number of pizzas the caterer make for a large party = twice of 4
= 2 × 4
= 8
So,the caterer makes 8 pizzas for a large party.
Quantity of pizza eat by each guest = 
of a pizza
Let the number of guests be taken as x.
Total guest in the party
= Total number of pizzas ÷ Amount of pizza eat by each guest.
⇒ 
Division changed into multiplication when the digit of the denominator is reversed.
⇒ 
⇒ x = 16
Hence pizzas served for 16 guests.
Answer:
ρ_air = 0.15544 kg/m^3
Step-by-step explanation:
Solution:-
- The deflated ball ( no air ) initially weighs:
m1 = 0.615 kg
- The air is pumped into the ball and weight again. The new reading of the ball's weight is:
m2 = 0.624 kg
- The amount of air ( mass of air ) pumped into the ball can be determined from simple arithmetic between inflated and deflated weights of the ball.
m_air = Δm = m2 - m1
m_air = 0.624 - 0.615
m_air = 0.009 kg
- We are to assume that the inflated ball takes a shape of a perfect sphere with radius r = 0.24 m. The volume of the inflated ( air filled ) ball can be determined using the volume of sphere formula:
V_air = 4*π*r^3 / 3
V_air = 4*π*0.24^3 / 3
V_air = 0.05790 m^3
- The density of air ( ρ_air ) is the ratio of mass of air and the volume occupied by air. Expressed as follows:
ρ_air = m_air / V_air
ρ_air = 0.009 / 0.05790
Answer: ρ_air = 0.15544 kg/m^3
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