How were decimals written in Roman

Roman Numerals

The Roman Numeral symbols have the following decimal values: I=1, V=5, X=10, L=50, C=100, D=500, M=1000 The symbols are written in additive (or subtractive) order from left to right. ... That is sufficient to represent the decimal number 999999999.

Options (1) and (5) are the correct options.

Step-by-step explanation:

The given question is incomplete: find the complete question attached.

Simon's work,

Area of the base = B = = m²

Volume = Bh = 32.5(12) = 390 m³

Let's check the error's he made.

Area of the base of the triangular prism

B =

B = 30 m²

Volume of the prism = (Area of the triangular base)×(Height)

V = 30 × 4

V = 120 m³

Therefore, Options (1) and (5) are the correct options.